Integrating gregorio-4.0.0-beta2

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+# Change Log
+All notable changes to this project will be documented in this file.
+As of v3.0.0 this project adheres to [Semantic Versioning](http://semver.org/). It follows [some conventions](http://keepachangelog.com/).
+
+## [Unreleased][unreleased]
+
+
+## [4.0.0-beta2] - 2015-08-26
+### Fixed
+- Corrected the rendering of explicit automatic and manual custos at the end of lines when the clef change that follows it is pushed to the next line (see [#569](https://github.com/gregorio-project/gregorio/issues/569)).
+- Distinguished between `eolshift` and `bolshift` giving each their own flag and user commmand for turning them on and off.  `\seteolshift{enable}` allows the lyric text to stretch under the custos at the end of the line.  `\setbolshift{enable}` aligns the beginning of each line on the notes instead of the text.  Both are on by default, but can be turned off with `\seteolshift{disable}` and `\setbolshift{disable}`.
+
+### Added
+- `\greillumination`: allows user to specify arbitrary content (usually an image) to be used as the initial.
+
+## [4.0.0-beta] - 2015-08-01
+### Fixed
+- Handling of the first syllable in gabc is now more consistent with the all other syllables.  This centers the syllable correctly when using latin syllable centering (see [#42](https://github.com/gregorio-project/gregorio/issues/42)) and makes the use of styles less surprising in the first syllable (see [#135](https://github.com/gregorio-project/gregorio/issues/135)).
+- Handling of manually-placed custos is improved.  In particular, a manual custos at the end of the score should no longer be lost when the bar happens to be at the end of the line.
+- Improved rendering of torculus resupinus flexus figures (see [#18](https://github.com/gregorio-project/gregorio/issues/18)).
+- Horizontal episema on the second note of a scandicus is now rendered in the correct place (see [#419](https://github.com/gregorio-project/gregorio/issues/419)).
+- The dot in a space directly above a punctum in a descending neume is now placed slightly higher in the space (see [#386](https://github.com/gregorio-project/gregorio/issues/386) and [Gna! bug 21737](https://gna.org/bugs/?21737)).
+- Choral signs are now positioned correctly around porrectus and torculus resupinus (see [#387](https://github.com/gregorio-project/gregorio/issues/387) and [Gna! bug 22025](https://gna.org/bugs/?22025)).
+- Gregorio will now try harder to select an appropriate pitch for an automatic custos (`z0`) on a clef change (see [#446](https://github.com/gregorio-project/gregorio/issues/446)).  If results are not satisfactory, use a manual custos (`+`) to select a pitch manually.
+- The centering of styled text under notes is now correct (See [#509](https://github.com/gregorio-project/gregorio/issues/509)).
+- Space for above lines text is now correctly added as needed, even at the beginning of a score (see [#533](https://github.com/gregorio-project/gregorio/issues/533)).
+
+### Changed
+- A new, more systematic naming scheme has been created for GregorioTeX macros.  The naming scheme should reduce the chances of naming conflicts with other packages and make it easier to identify what a particular macro is for and how to use it.  Most user functions have been renamed in order to bring them into line with this scheme.  Please see GregorioRef for a complete list of the new function names.  In general, old names will still work, but they will raise a deprecation warning and will be dropped from GregorioTeX in a future relase.
+- The spacing algorithm has completely changed, expect your scores to look quite different (better we hope).
+- Lines are now aligned on the leftmost note instead of the leftmost letter.
+- Some glyph shapes are improved a little in greciliae, it should be noticeable especially for porrectus.
+- The `O` modifier in gabc now has expanded uses beyond the salicus `(egOi)`.  A stemmed oriscus will appear on a lone pitch `(gO)` or a followed by a lower pitch `(gOe)` (see [#76](https://github.com/gregorio-project/gregorio/issues/76)).  A virga strata will appear on the second note of two ascending pitches `(giO)`.
+- With thanks to *Abbazia Mater Ecclesiae (IT)* for drawing the new shapes, the strophicus, liquescent strophicus, liquescent oriscus, and liquescent punctum inclinatum in greciliae have changed to better differentiate them from other shapes. If you prefer the old shapes use:
+```
+    \grechangeglyph{Stropha}{greciliae}{.caeciliae}
+    \grechangeglyph{StrophaAucta}{greciliae}{.caeciliae}
+    \grechangeglyph{OriscusDeminutus}{greciliae}{.caeciliae}
+    \grechangeglyph{PunctumInclinatumAuctus}{greciliae}{.caeciliae}
+```
+- Default initial sizes have been chosen so that they are more appropriate when an infinitely scaling font is loaded.  LaTeX will make an automatic substitution of the closest avaialble size when such a font is not used.
+- Porrectus deminutus and torculus resupinus deminutus glyphs have been updated to more closely match the current Solesmes books (see [#143](https://github.com/gregorio-project/gregorio/issues/143)).  If you prefer the old forms, use:
+```
+    \grechangeglyph{Porrectus*}{*}{.alt}
+    \grechangeglyph{TorculusResupinus*}{*}{.alt}
+```
+- New (much) improved drawings for letter bars (for Versicle, Antiphon, etc.). You must fine-tune them if you use a text font other than Linux Libertine, see [UPGRADE.md](UPGRADE.md) for details.
+- The default extension `gregorio` (the executable program) will use when it produces GregorioTeX files has been changed from `.tex` to `.gtex`.  Any calls to `\includescore` that use the old extension should be changed appropriately.
+- Horizontal episema improvements:
+  - A horizontal episema on the first two notes of a porrectus is now rendered differently than a horizontal episema on all three notes of a porrectus.  It will no longer reach to the right side of the porrectus  (see [#70](https://github.com/gregorio-project/gregorio/issues/70)).
+  - Similar to appending `0` to the `_` to force a horizontal episema to appear below a note, `1` may now be appended to the `_` to force a horizontal episema to appear above the note.  These may be used simutaneously, by adding both `_0` and `_1` to the same note (see [#40](https://github.com/gregorio-project/gregorio/issues/40)).
+  - It is now possible to render a small horizontal episema.  To use it, append `3` (for left-aligned), `4` (for center-aligned), or `5` (for right-aligned) to the `_` used for adding the horizontal episema in gabc (see [#40](https://github.com/gregorio-project/gregorio/issues/40)).
+  - Horizontal episema "bridging" has been made more consistent and is now possible on an episema that is below the note. (see [#389](https://github.com/gregorio-project/gregorio/issues/70)).
+  - It is now possible to suppress the automatic horizontal episema "bridging" across spaces within a syllable.  To use it, append `2` to the `_` on the note before the space you do not want bridged (see [#72](https://github.com/gregorio-project/gregorio/issues/72)).
+  - A horizontal episema will no longer overlap with a vertical episema on the same note (see [#395](https://github.com/gregorio-project/gregorio/issues/395)).
+- The dot after a torculus whose last note is on a line will now appear below the line (see [#386](https://github.com/gregorio-project/gregorio/issues/386)).  If you do not like the automatic placement of a dot after any note on a line (not just the torculus), you may specify a `0` or `1` after the `.` to force the dot to appear below or above the line, respectively.
+- Choral sign dimensions have been renamed (see [#387](https://github.com/gregorio-project/gregorio/issues/387)):
+  - `beforechoralsignspace` is now `beforelowchoralsignspace`.
+  - `lowchoralsignshift` is now `choralsigndownshift`.
+  - `highchoralsignshift` is now `choralsignupshift` and its sign is now inverted.
+- Style for score elements can now be changed via the `\grechangestyle` command.  This replaces the mixed system of styling commands which could be redefined for some elements and specialized commands for applying styles to others.  See GregorioRef for details.
+- Annotations with more than two lines are now supported (originally requested [on the user list](http://www.mail-archive.com/gregorio-users%40gna.org/msg00164.html) when two line annoations were made possible).  To build the annotation box use `\greannoataion`.  See GregorioRef for details.
+- The `annotation` header field in `gabc` now places its value(s) above the inital if no annotation is explicitly given by the user via `\greannotation` (see [#44](https://github.com/gregorio-project/gregorio/issues/44)).
+- `\grescaledim` now takes two arguments to bring it into line with the systemized naming scheme.  The second argument should be `yes`, `true`, or `on` if you want the distance to scale when the staff size changes.  Anything else will make the distance independent of the staff size.
+- Gregorio is now able to make individual lines of a score taller, when the position of the note require extra space, without affecting the rest of the lines.  This is the new default behavior.  See [UPGRADE.md](UPGRADE.md) and GregorioRef for details (for the change request, see [#59](https://github.com/gregorio-project/gregorio/issues/59)).
+- Braces are now rendered using MetaPost by default.  This allows the line weight to remain more consistent when braces are stretched.  The old behavior (which uses the score font instead) can be restored using `\gresetbracerendering{font}`.  See [UPGRADE.md](UPGRADE.md) and GregorioRef for details (for the change request, see [#535](https://github.com/gregorio-project/gregorio/issues/535)).
+
+### Added
+- With thanks to Jakub Jelínek, St. Gallen style adiastematic notation is now handled through [nabc syntax](http://gregoriochant.org/dokuwiki/doku.php/language) (see GregorioNabcRef.pdf for details and [the new example](examples/FactusEst.gabc)). Only one line above the notes is currently handled. This is a preview, backward incompatible change are possible in future releases.
+- `<eu>` tag in gabc to delimit *Euouae* block in the score. It prevents linebreaking and makes spaces tighter. See [UPGRADE.md](UPGRADE.md) for details.
+- With thanks to Fr. Jacques Peron, it is now possible to embed short gabc snippets directly into a TeX document.  The command is `\gabcsnippet`.  See GregorioRef.pdf for full details.
+- `[ub:x:y mm]` tag, similar to `[ob:x:y mm]`, but for braces under notes.
+- `[ob:x{]` and `[ob:x}]` tag pairs for braces where the length is determined by the distance of the opening and closing tags.  `[ocb:x{]` with `[ocb:x}]`, `[ocba:x{]` with `[ocba:x}]` and `[ub:x{]` with `[ub:x}]` can be used similarly for other kinds of braces and brackets.
+- The ability to substitute an arbitrary glyph for one used by GregorioTeX.  This adds four macros:
+  - `\grechangeglyph` to make a score glyph substitution
+  - `\greresetglyph` to remove a score glyph substitution
+  - `\gredefsymbol` for (re-)defining an arbitrary non-score glyph that scales with the text
+  - `\gredefsizedsymbol` for (re-)defining an arbitary non-score glyph that requires a point-size to be specified.
+See GregorioRef.pdf for full details.
+- Added `--with-kpathsea` option to configure script, to check input and output file against `openout_any` and `openin_any` settings of texmf.cnf (TeXLive only). Necessary to be included in `shell_escape_commands` in TeXLive.
+- Support for `lualatex -recorder`.  Autocompiled gabc and gtex files will now be properly recorded so that programs like `latexmk -recorder` can detect the need to rebuild the PDF when a gabc file changes.
+- A vertical episema may now be forced to appear above or below a note.  In gabc, use `'0` for the vertical episema to appear below and `'1` for the vertical episema to appear above (see [#385](https://github.com/gregorio-project/gregorio/issues/385)).
+- The first syllable and first letter of the first syllable that is *not* interpreted as the initial of the score are now passed to macros that allow them to be styled from TeX.  The first syllable is passed to `\GreFirstSyllable#1` and the first letter of the first syllable is passed to `\GreFirstSyllableInitial#1`.
+- The final line of a score may now be forced to be fully justified (rather than ragged) using `\gresetlastline{justified}` before including the score (see [#43](https://github.com/gregorio-project/gregorio/issues/43)).  Use `\gresetlastline{ragged}` to switch back to a ragged last line.
+- `\gresethyphen{force}` forces GregorioTeX to put a hyphen between each syllable in a polysyllabic word.  `\gresethyphen{auto}` restores behavior to normal.
+- Support for custom vowel centering rules.  Put a file called `gregorio-vowels.dat` into your project directory or into a directory accessible from TEXMF and add the header `language: name;` to your gabc file.  The `gregorio-vowels.dat` file describes how vowels are to be located in the *name* language.  See GregorioRef for details.
+- `\gresetlinecolor` takes a named color as an argument.  As a result, the red staff lines can be made consistent with the text, even when the user changes `gregoriocolor` with `\gresetlinecolor{gregoriocolor}`.  Addresses [#21787 on the old tracker](https://gna.org/bugs/index.php?21787).
+- Package option `deprecated=false`. Causes all deprecated commands to raise an error and halt TeX.
+- The ability to add LilyPond-like point-and-click textedit links into the PDF file to aid with debugging scores.  This must be explicitly enabled and **should be turned off** when producing files for distribution as it embeds path information into the output.  To enable this, you must pass the `-p` option to gregorio when compiling gabc files and add `\gresetpointandclick{on}` before including the score.  It may be toggled back off with `\gresetpointandclick{off}`.  See GregorioRef for details (for the change request, see [#528](https://github.com/gregorio-project/gregorio/issues/528)).
+- New score fonts with glyphs unique to Dominican chant.  These fonts replace the epiphonus and the augmented liquescents with corresponding figures from Dominican liturgical books.  To use the new fonts, pass the `[op]` option to the `\gresetgregoriofont` command (i.e., `\gresetgregoriofont[op]{greciliae}`).  See GregorioRef for details (for the change request, see [#1](https://github.com/gregorio-project/gregorio/issues/1)).
+- Support for "punctum cavum inclinatum" and "punctum cavum inclinatum auctus" figures.  The gabc for these are `(Gr)` and `(Gr<)`, where `G` is the capitalized pitch letter.
+
+### Deprecated
+- `\GreSetStaffLinesFormat`, supplanted by `\grechangeformat{normalstafflines}...`
+- `\greinitialformat`, if you were redefining this command, use `\grechangeformat{initial}...` instead
+- `\grebiginitialformat`, if you were redefining this command, use `\grechangeformat{biginitial}...` instead
+- `\gretranslationformat`, if you were redefining this command, use `\grechangeformat{translation}...` instead
+- `\greabovelinestextstyle`, if you were redefining this command, use `\grechangeformat{abovelinestext}...` instead
+- `\grelowchoralsignstyle`, if you were redefining this command, use `\grechangeformat{lowchoralsign}...` instead
+- `\grehighchoralsignstyle`, if you were redefining this command, use `\grechangeformat{highchoralsign}...` instead
+- `centering-scheme` gabc header, supplanted by `\grelyriccentering` in TeX.  See GregorioRef for syntax.
+- `\setaboveinitialseparation`, supplanted by `\grechangedim{annotationseparation}...`
+- `gregoriotex-font` gabc header, supplanted by `\gresetgregoriofont` in TeX.  See GregorioRef for syntax.
+- `\scorereference`, supplanted by `\grescorereference`
+- `\GreScoreReference`, supplanted by `\grescorereference`
+- `\commentary`, supplanted by `\grecommentary`
+- `\setgretranslationcenteringscheme`, supplanted by `\gresettranslationcentering`
+- `\englishcentering`, supplanted by `\gresetlyriccentering{syllable}`
+- `\defaultcentering`, supplanted by `\gresetlyriccentering{vowel}`
+- `\setgrefactor`, supplanted by `\grechangestaffsize`
+- `\forcecompilegabc`, supplanted by `\gresetcompilegabc{force}`
+- `\autocompilegabc`, supplanted by `\gresetcompilegabc{auto}`
+- `\nevercompilegabc`, supplanted by `\gresetcompilegabc{never}`
+- `\includescore`, supplanted by `\gregorioscore`
+- `\grenoscaledim`, supplanted by `\grescaledim{...}{no}`
+- `\gresetdim`, supplanted by `\grecreatedim`
+- `\setstafflinethickness`, supplanted by `\grechangestafflinethickness`
+- `\grecoloredlines`, supplanted by `\gresetlinecolor`
+- `\greredlines` and `\redlines`, supplanted by `\gresetlinecolor{gregoriocolor}`
+- `\grenormallines` and `\normallines`, supplanted by `\gresetlinecolor{black}`
+- `\greremovelines`, supplanted by `\gresetlines{invisible}`
+- `\gredonotremovelines`, supplanted by `\gresetlines{visible}`
+- `\GreHidePCLines`, supplanted by `\gresetlinesbehindpunctumcavum{invisible}`
+- `\GreDontHidePCLines`, supplanted by `\gresetlinesbehindpunctumcavum{visible}`
+- `\GreHideAltLines`, supplanted by `\gresetlinesbehindalteration{invisible}`
+- `\GreDontHideAltLines`, supplanted by `\gresetlinesbehindalteration{visible}`
+- `\gresetnlbintranslation`, supplanted by `\gresetbreakintranslation`
+- `\greblockcustos`, supplanted by `\greseteolcustos{manual}`
+- `\greenableeolshifts`, supplanted by `\greseteolshifts{enable}`
+- `\gredisableeolshifts`, supplanted by `\greseteolshifts{disable}`
+- `\GreUseNoramalHyphen`, supplanted by `\greseteolhyphen{normal}`
+- `\GreUseZeroHyphen`, supplanted by `\greseteolhyphen{zero}`
+- `\greremoveclef`, supplanted by `\gresetclef{invisible}`
+- `\grenormalclef`, supplanted by `\gresetclef{visible}`
+- `\AddHEpisemusBridges`, supplanted by `\gresethepisemus{bridge}`
+- `\RemoveHEpisemusBridges`, supplanted by `\gresethepisemus{break}`
+- `\UseAlternatePunctumCavum`, supplanted by `\gresetpunctumcavum{alternate}`
+- `\UseNormalPunctumCavum`, supplanted by `\gresetpunctumcavum{normal}`
+- `\clivisalignmentalways`, supplanted by `\gresetclivisalignment{always}`
+- `\clivisalignmentnever`, supplanted by `\gresetclivisalignment{never}`
+- `\clivisalignmentspecial`, supplanted by `\gresetclivisalignment{special}`
+- `\greusedefaultstyle`, supplanted by `\gresetglyphsytle{default}`
+- `\greusemedicaeastyle`, supplanted by `\gresetglyphsytle{medicaea}`
+- `\greusehufnagelstyle`, supplanted by `\gresetglyphsytle{hufnagel}`
+- `\greusemensuralstyle`, supplanted by `\gresetglyphsytle{mensural}`
+- `\setspaceafterinitial`, supplanted by `\grechangedim{afterinitialshift}...`
+- `\setspacebeforeinitial`, supplanted by `\grechangedim{beforeinitialshift}...`
+- `\setinitialspacing`, supplanted by `\grechangedim{beforeinitialshift}...`, `\grechangedim{manualinitialwidth}...`, and `\grechangedime{afterinitialshift}...`
+
+
+### Removed
+- GregorioXML and OpusTeX output
+- Support for `lilypond-preamble`, `musixtex-preamble`, and `opustex-preamble` gabc headers.
+- Support for the font Gregoria.
+- Chironomy markings (gabc `u` and `U`), which were not working correctly in the first place.
+- `\Vbarsmall`, `\greletterbar`, and `\greletteraltbar`, supplanted by the new glyph system, see [UPGRADE.md](UPGRADE.md).
+- `\GreSetAboveInitialSeparation`, supplanted by `\grechangedim{annotationseparation}...`
+- `\includetexscore`, supplanted by `\gregorioscore[n]`
+- `\greincludetexscore`, supplanted by `\gregorioscore[n]`
+- `\includegabcscore`, supplanted by `\gregorioscore[f]`
+- `\greincludegabcscore`, supplanted by `\gregorioscore[f]`
+- `\GreSetSpaceBeforeInitial`, supplanted by `\grechangedim{beforeinitialshift}...`
+- `\GreSetSpaceAfterInitial`, supplanted by `\grechangedim{afterinitialshift}...`
+- `\GreSetAboveInitialSeparation`, supplanted by `\grechangedim{annotationseparation}...`
+- `\gresetstafflinefactor`, supplanted by `\grechangestafflinethickness`
+- `greg-book` and `greg-lily-book` engines, supplanted by improved capabilities of `\gregorioscore` for compiling gabc files at time of document compilation.
+
+
+
+## [3.0.3] - 2015-07-01
+### Fixed
+- Horizontal episemae on salicus figures now render correctly (See [#511](https://github.com/gregorio-project/gregorio/issues/511)).
+
+## [3.0.2] - 2015-06-01
+### Fixed
+- Prevented the default small font of the above lines text from leaking into the lyrics.
+
+## [3.0.1] - 2015-05-17
+### Fixed
+- Windows Installer is now compatible with MiKTeX.  See [#355](https://github.com/gregorio-project/gregorio/issues/355).
+
+## [3.0.0] - 2015-05-14
+### Changed
+- [New website](http://gregorio-project.github.io) containing instructions only for new versions of Gregorio starting with this release, in English only.
+- New clean Mac OSX installer (intel only).
+- New incompatible format of space configuration files (`gsp-xxx.tex`).  Values are now scaled to the default staff size (see [#50](https://github.com/gregorio-project/gregorio/issues/50).  You now need to use `\gresetdim` for setting distances (`\somedistance = 3cm`) can no longer be used).  `\gresetdim` takes three arguments: the name of the distance, the desired value, and whether the distance should scale with changes in the staff size or not.  See `gsp-default.tex` for an example.
+- All distances can now be set to scale with staff size, as a consequence `\grechangedim` now takes three arguments: the name of the distance, value to change the distance to (which now supports em and ex units), and whether or not this value should be scaled with changes in the staff size.  See doc/UserManual.pdf for details.
+- `\setinitalspacing` , `\setspacebeforeinitial`, `\setspaceafterinitial`, and `\setaboveinitialseparation` now take an additional argument.  The new argument specifies whether the distance should scale when the staff size changes.
+- Improved `\includescore` capabilities.  The `\includescore[f]` parameter has changed to `\includescore[n]` compared to version 2.4.2.  See doc/UserManual.pdf for full details and UPGRADING.md for instructions on how to upgrade your score from 2.4.2.
+- Clivis stem length now follow Solesmes' books conventions (see [#31](https://github.com/gregorio-project/gregorio/issues/31)).
+- Windows TeXworks configuration script no longer adds deprecated `greg-book` and `gregorio` engines (see below).
+- `build.sh` and `install.sh` scripts are now used to build and install Gregorio with common options.
+- Clarified post installation options for Windows installer.  What was the "Install Fonts" option is now labeled to indicate that this also adds GregorioTeX files to the texmf tree.
+- `\grechangedim` now checks to make sure it only operates on existing distances and doesn't create a new one.
+
+### Fixed
+- `\includescore` not finding files for autocompile under certain circumstances.  (see [this thread](http://www.mail-archive.com/gregorio-users@gna.org/msg02346.html)).
+- Spacing between a syllable and a syllable with text and only a bar was too short.
+- Torculus followed by a non-liquescent note is now parsed correctly (see [#284](https://github.com/gregorio-project/gregorio/issues/284).
+- Spacing after a syllable with an flat, sharp, or natural is now correct (see [#246](https://github.com/gregorio-project/gregorio/issues/246).
+
+### Added
+- `\setstafflinethickness` controls the thickness of the staff lines.  See GregorioRef.pdf for full details.
+- `\gre@debug`.  Writes messages to the log file when the debug flag is set to true (can be done manually via `\debugtrue`, or via the `debug` option when loading the gregoriotex package in LaTeX).
+- New documentation in PDF: GregorioRef.pdf. You can find it in the [release files](https://github.com/gregorio-project/gregorio/releases).
+- A migration guide ([UPGRADE.md](UPGRADE.md))
+- This CHANGELOG.
+- A Windows batch file which will detect the system setup and create a report which can be useful in diagnosing installation problems.  Instructions for how to use it appear [under the installation instructions for Windows on the website.](http://gregorio-project.github.io/installation-windows.html)
+
+### Deprecated
+- OpusTeX writing and GregorioXML reading and writing features will disappear in next minor release
+- The [old website](http://home.gna.org/gregorio/) contains instructions for old versions of Gregorio only, and will not be updated anymore.
+- the `-O` option
+- `\includetexscore`, supplanted by `\includescore[n]`
+- `\greincludetexscore`, supplanted by `\includescore[n]`
+- `\includegabcscore`, supplanted by `\includescore[f]`
+- `\greincludegabcscore`, supplanted by `\includescore[f]`
+- `\GreSetSpaceBeforeInitial`, supplanted by `\setspacebeforeinitial`
+- `\GreSetSpaceAfterInitial`, supplanted by `\setspaceafterinitial`
+- `\GreSetAboveInitialSeparation`, supplanted by `\setaboveinitialseparation`
+- `\gresetstafflinefactor`, supplanted by `\setstafflinethickness`
+- `greg-book` and `greg-lily-book` engines, supplanted by improved capabilities of `\includescore` for compiling gabc files at time of document compilation.
+
+## 2.4.3 - 2015-03-14 [YANKED]
+
+## 2.4.2 - 2015-02-27
+### Changed
+- Improved `\includescore` with GregorioTeX API version checking (auto-compiling when possibly breaking Gregorio update).
+- Clivis and pes quadratum alignment now follows Solesmes' conventions more closely (see [#10](https://github.com/gregorio-project/gregorio/issues/10)).
+
+### Fixed
+- Reducing horizontal episemus width.
+- Reducing flat stem length.
+- `mode` and `anotation-line` now do their job.
+- Low episemus (`_0`) under consecutive notes are now aligned correctly.
+- Quilisma was melting too much with next note when in a second interval.
+- Fixed custo blocking possibility.
+- Fixing glyphs disapearing when importing into Illustrator.
+
+### Added
+- English centering scheme now available as GregorioTeX option.
+- `\setinitialspacing` to control all spaces related to initial with one command.
+- `\gremanualinitialwidth` macro to specify width of all initials.
+- Virga aucta (for liquescent salicus), gabc `iv>`.
+- Torculus liquescent deminutus and quilisma version, gabc `dfec~` and `dwfec~`.
+- Pressus maior liquescens: `hof~`.
+- Rare form of scandicus.
+- Added `<c>` markup in gabc to denote a change of color.
+- Added `<nlba>` markup in gabc to get areas with no line breaks.
+- Possibility to center translation syllable by syllable, see [here](https://www.mail-archive.com/gregorio-users@gna.org/msg01760.html) and [here](https://www.mail-archive.com/gregorio-users@gna.org/msg01783.html).
+
+## 2.0 - 2010-09-27
+### Changed
+- gregorio API changed and GregorioTeX macros prepended with `\gre`, to avoid potential name conflicts
+- updated greciliae font
+- fine-tuning the spacing, and making it easier for users to change the defaults
+- GregorioXML reading is now optional (via `--enable-xml-read` flag)
+
+### Fixed
+- as always, fixing a lot of bugs
+
+### Added
+- Automatic Windows installer
+- adding requested features: Dominican bars, choral signs, text above staff lines
+- enabling comments in gabc files
+- adding ability to write verbatim TeX at {note, glyph, element} level
+- introducing horizontal episemus bridges
+- default output is now utf8 directly; the `-O`  option allows old-style TeX output, i.e. `\char XXXX`
+- new static build system for packaged distributions
+
+
+## 1.0 - 2009-10-19
+### Changed
+- changing the number of arguments of some TeX function
+- changing the glyph names
+- improving the spacings
+- better management of the penalty in TeX so that the line changes are more consistent
+- changing the markup system in gabc to be more natural
+
+### Fixed
+- fixing a lot of bugs
+
+### Added
+- adding the possibility to put a flat after the clef
+- adding the possibility to put a custo before a clef change
+
+
+## 0.9.2 - 2008-12-27
+### Changed
+- changing the number of arguments of some TeX function
+- changing the glyph names
+
+### Fixed
+- fixing a lot of bugs
+
+### Added
+- LuaTeX additional functionalities
+
+
+## 0.9.1 - 2008-11-23
+### Changed
+- changing the number of arguments of some TeX functions
+
+### Fixed
+- fixing a lot of small bugs
+
+
+## 0.9 - 2008-07-25
+### Changed
+- stabilizing the TeX API
+
+### Added
+- adding support for Cygwin compilation
+- adding too many new features to be listed
+
+
+## 0.3 - 2008-01-18
+### Changed
+- changing the architecture of libraries and plugins
+
+### Added
+- adding support for end of lines
+- adding support for compilation on MAC OSX
+
+     
+## 0.2.2 - 2007-06-14
+### Added
+- adding styles and centering in text
+
+[3.0.0-rc1]: https://github.com/gregorio-project/gregorio/compare/v2.4.2...v3.0.0-rc1
+[3.0.0-rc2]: https://github.com/gregorio-project/gregorio/compare/v3.0.0-rc1...v3.0.0-rc2