= fix typo in README
! rename `CharPredicate.HexAlpha` to `HexDigit`
= Fix "Invalid rule definition" when calling free rule methods, fixes #43
= Fix "Identifiers not decoded in error messages', closes #44
= Extend `~>` action function parameter maximum from 5 to 9, closes #45
= Add small optimization to phantom types
= Bump version number to 2.0-SNAPSHOT
= Add reference to snapshot builds to README
WIP Make ParseError generation optional. Related to https://github.com/sirthias/parboiled2/issues/10