0.32.0

CHANGES:

• Add an optional embed_errors argument to Context_free.map_top_down that
  controls how to deal with exceptions thrown by context-free rules.
  (#468, @NathanReb)

• Fix Longident.parse so it properly handles unparenthesized dotted operators
  such as +. or *.. (#111, @rgrinberg, @NathanReb)

• raising an exception does no longer cancel the whole context free phase(#453, @Burnleydev1)

• Sort embedded errors that are appended to the AST by location so the compiler
  reports the one closer to the beginning of the file first. (#463, @NathanReb)

• Update Attribute.get to ignore loc_ghost. (#460, @ceastlund)

• Add API to manipulate attributes that are used as flags (#408, @dianaoigo)

• Update changelog to use ISO 8061 date format: YYYY-MM-DD. (#445, @ceastlund)

• Replace Caml with Stdlib. (#427, @ceastlund)

• When a transformation raises, the last valid AST is used as input to the upcoming
  transformations. All such errors are collected and appended as
  extension nodes to the final AST (#447, @Burnleydev1)

• Fix a small mistake in the man pages: Embededding errors is done by default with
  -as-pp, not with -dump-ast (#464, @pitag-ha)

• Set appropriate binary mode when writing to stdout especially for Windows
  compatibility. (#466, @jonahbeckford)