- [cffLib.specializer] Added new ``specializer`` module to optimize CFF
  charstrings, used by the T2CharStringPen (#948).
- [varLib.mutator] Sort glyphs by component depth before calculating composite
  glyphs' bounding boxes to ensure deltas are correctly caclulated (#945).
- [_g_l_y_f] Fixed loss of precision in GlyphCoordinates by using 'd' (double)
  instead of 'f' (float) as ``array.array`` typecode (#963, #964).

- [t2CharStringPen] Initial support for specialized Type2 path operators:
  vmoveto, hmoveto, vlineto, hlineto, vvcurveto, hhcurveto, vhcurveto and
  hvcurveto. This should produce more compact charstrings (#940, #403).
- [Doc] Added Sphinx sources for the documentation. Thanks @gferreira (#935).
- [fvar] Expose flags in XML (#932)
- [name] Add helper function for building multi-lingual names (#921)
- [varLib] Fixed kern merging when a PairPosFormat2 has ClassDef1 with glyphs
  that are NOT present in the Coverage (1b5e1c4, #939).
- [varLib] Fixed non-deterministic ClassDef order with PY3 (f056c12, #927).
- [feLib] Throw an error when the same glyph is defined in multiple mark
  classes within the same lookup (3e3ff00, #453).

- [varLib] Added support for building ``avar`` table, using the designspace
  ``<map>`` elements.
- [varLib] Removed unused ``build(..., axisMap)`` argument. Axis map should
  be specified in designspace file now. We do not accept nonstandard axes
  if ``<axes>`` element is not present.
- [varLib] Removed "custom" axis from the ``standard_axis_map``. This was
  added before when glyphsLib was always exporting the (unused) custom axis.
- [varLib] Added partial support for building ``MVAR`` table; does not
  implement ``gasp`` table variations yet.
- [pens] Added FilterPen base class, for pens that control another pen;
  factored out ``addComponent`` method from BasePen into a separate abstract
  DecomposingPen class; added DecomposingRecordingPen, which records
  components decomposed as regular contours.
- [TSI1] Fixed computation of the textLength of VTT private tables (#913).
- [loggingTools] Added ``LogMixin`` class providing a ``log`` property to
  subclasses, which returns a ``logging.Logger`` named after the latter.
- [loggingTools] Added ``assertRegex`` method to ``CapturingLogHandler``.
- [py23] Added backport for python 3's ``types.SimpleNamespace`` class.
- [EBLC] Fixed issue with python 3 ``zip`` iterator.

- [pens] Added pen to draw glyphs using WxPython ``GraphicsPath`` class:
  https://wxpython.org/docs/api/wx.GraphicsPath-class.html
- [varLib.merger] Fixed issue with recombining multiple PairPosFormat2
  subtables (#888)
- [varLib] Do not encode gvar deltas that are all zeroes, or if all values
  are smaller than tolerance.
- [ttLib] _TTGlyphSet glyphs now also have ``height`` and ``tsb`` (top
  side bearing) attributes from the ``vmtx`` table, if present.
- [glyf] In ``GlyphCoordintes`` class, added ``__bool__`` / ``__nonzero__``
  methods, and ``array`` property to get raw array.
- [ttx] Support reading TTX files with BOM (#896)
- [CFF2] Fixed the reporting of the number of regions in the font.

- [varLib.merger] Fixed issue while recombining multiple PairPosFormat2
  subtables if they were split because of offset overflows (9798c30).
- [varLib.merger] Only merge multiple PairPosFormat1 subtables if there is
  at least one of the fonts with a non-empty Format1 subtable (0f5a46b).
- [varLib.merger] Fixed IndexError with empty ClassDef1 in PairPosFormat2
  (aad0d46).
- [varLib.merger] Avoid reusing Class2Record (mutable) objects (e6125b3).
- [varLib.merger] Calculate ClassDef1 and ClassDef2's Format when merging
  PairPosFormat2 (23511fd).
- [macUtils] Added missing ttLib import (b05f203).

- [feaLib] Added (partial) support for parsing feature file comments ``# ...``
  appearing in between statements (#879).
- [feaLib] Cleaned up syntax tree for FeatureNames.
- [ttLib] Added support for reading/writing ``CFF2`` table (thanks to
  @readroberts at Adobe), and ``TTFA`` (ttfautohint) table.
- [varLib] Fixed regression introduced with 3.8.0 in the calculation of
  ``NumShorts``, i.e. the number of deltas in ItemVariationData's delta sets
  that use a 16-bit representation (b2825ff).

- New pens: MomentsPen, StatisticsPen, RecordingPen, and TeePen.
- [misc] Added new ``fontTools.misc.symfont`` module, for symbolic font
  statistical analysis; requires ``sympy`` (http://www.sympy.org/en/index.html)
- [varLib] Added experimental ``fontTools.varLib.interpolatable`` module for
  finding wrong contour order between different masters
- [varLib] designspace.load() now returns a dictionary, instead of a tuple,
  and supports <axes> element (#864); the 'masters' item was renamed 'sources',
  like the <sources> element in the designspace document
- [ttLib] Fixed issue with recalculating ``head`` modified timestamp when
  saving CFF fonts
- [ttLib] In TupleVariation, round deltas before compiling (#861, fixed #592)
- [feaLib] Ignore duplicate glyphs in classes used as MarkFilteringSet and
  MarkAttachmentType (#863)
- [merge] Changed the ``gasp`` table merge logic so that only the one from
  the first font is retained, similar to other hinting tables (#862)
- [Tests] Added tests for the ``varLib`` package, as well as test fonts
  from the "Annotated OpenType Specification" (AOTS) to exercise ``ttLib``'s
  table readers/writers (<https://github.com/adobe-type-tools/aots>)

- [subset] Keep advance widths when stripping ".notdef" glyph outline in
  CID-keyed CFF fonts (#845)
- [feaLib] Zero values now produce the same results as makeotf (#633, #848)
- [feaLib] More compact encoding for “Contextual positioning with in-line
  single positioning rules” (#514)

- [subset] Fixed issue with ``--no-hinting`` option whereby advance widths in
  Type 2 charstrings were also being stripped (#709, #343)
- [feaLib] include statements now resolve relative paths like makeotf (#838)
- [feaLib] table ``name`` now handles Unicode codepoints beyond the Basic
  Multilingual Plane, also supports old-style MacOS platform encodings (#842)
- [feaLib] correctly escape string literals when emitting feature syntax (#780)

- [ttx, mtiLib] Preserve ordering of glyph alternates in GSUB type 3 (#833).
- [feaLib] Glyph names can have dashes, as per new AFDKO syntax v1.20 (#559).
- [feaLib] feaLib.Parser now needs the font's glyph map for parsing.
- [varLib] Fix regression where GPOS values were stored as 0.
- [varLib] Allow merging of class-based kerning when ClassDefs are different