Version 0.4 (2016-07-11)

   Use grako instead of PLY to compile EBNF to Python.

Version 0.3 (2014-06-22)

   Allow '&&', '||', ' AND ', ' and ', ' OR ', ' or ', 'NOT ' and 'not '.

Version 0.2 (2014-06-06)

   Ignore spaces.

Version 0.1 (2014-05-20)

   First release. Very simple grammar.