• [otlLib/varLib] Ensure that the AxisNameID in the STAT and fvar tables is grater than 255 as per OpenType spec (#1985, #1986).
• [docs] Document more modules in fontTools.misc package: filenames, fixedTools, intTools, loggingTools, macCreatorType, macRes, plistlib (#1981).
• [OS/2] Don't calculate whole sets of unicode codepoints, use faster and more memory efficient ranges and bisect lookups (#1984).
• [voltLib] Support writing back abstract syntax tree as VOLT data (#1983).
• [voltLib] Accept DO_NOT_TOUCH_CMAP keyword (#1987).
• [subset/merge] Fixed a namespace clash involving a private helper class (#1955).