Fonttools

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- [varLib.merger] Fixed "TypeError: reduce() of empty sequence with no
initial value" (3717dc6).

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- [py23] Fixed unhandled exception occurring at interpreter shutdown in
the "last resort" logging handler (972b3e6).
- [agl] Ensure all glyph names are of native 'str' type; avoid mixing
'str' and 'unicode' in TTFont.glyphOrder (d8c4058).
- Fixed inconsistent title levels in README.rst that caused PyPI to
incorrectly render the reStructuredText page.

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- [varLib] Refactored and improved the variation-font-building process.
- Assembly code in the fpgm, prep, and glyf tables is now indented in
XML output for improved readability. The ``instruction`` element is
written as a simple tag if empty (819).
- [ttx] Fixed 'I/O operation on closed file' error when dumping
multiple TTXs to standard output with the '-o -' option.
- The unit test modules (``*_test.py``) have been moved outside of the
fontTools package to the Tests folder, thus they are no longer
installed (811).

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- Font tables read from XML can now be written back to XML with no
loss.
- GSUB/GPOS LookupType is written out in XML as an element, not
comment. (792)
- When parsing cmap table, do not store items mapped to glyph id 0.
(790)
- [otlLib] Make ClassDef sorting deterministic. Fixes 766 (7d1ddb2)
- [mtiLib] Added unit tests (787)
- [cvar] Implemented cvar table
- [gvar] Renamed GlyphVariation to TupleVariation to match OpenType
terminology.
- [otTables] Handle gracefully empty VarData.Item array when compiling
XML. (797)
- [varLib] Re-enabled generation of ``HVAR`` table for fonts with
TrueType outlines; removed ``--build-HVAR`` command-line option.
- [feaLib] The parser can now be extended to support non-standard
statements in FEA code by using a customized Abstract Syntax Tree.
See, for example, ``feaLib.builder_test.test_extensions`` and
baseClass.feax (794, fixes 773).
- [feaLib] Added ``feaLib`` command to the 'fonttools' command-line
tool; applies a feature file to a font. ``fonttools feaLib -h`` for
help.
- [pens] The ``T2CharStringPen`` now takes an optional
``roundTolerance`` argument to control the rounding of coordinates
(804, fixes 769).
- [ci] Measure test coverage on all supported python versions and OSes,
combine coverage data and upload to
https://codecov.io/gh/fonttools/fonttools (#786)
- [ci] Configured Travis and Appveyor for running tests on Python 3.6
(785, 55c03bc)
- The manual pages installation directory can be customized through
``FONTTOOLS_MANPATH`` environment variable (799, fixes 84).
- [Snippets] Added otf2ttf.py, for converting fonts from CFF to
TrueType using the googlei18n/cu2qu module (802)

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- [feaLib] Added support for generating FEA text from abstract syntax
tree (AST) objects (776). Thanks mhosken
- Added ``agl.toUnicode`` function to convert AGL-compliant glyph names
to Unicode strings (774)
- Implemented MVAR table (b4d5381)

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- [setup] We no longer use versioneer.py to compute fonttools version
from git metadata, as this has caused issues for some users (767).
Now we bump the version strings manually with a custom ``release``
command of setup.py script.