Eliminated ‘Text.Megaparsec.Language’ module because at this point it is
clear that already existing definitions are of little use in
Megaparsec. I started writing “default” language definition in
‘Text.Megaparsec.Lexer’.
At this point it should be possible to parse languages where indentation
matters, although we will need to provide more helpers to make it
easier.
The following functions and data types have been renamed:
* ‘permute’ → ‘makePermParser’
* ‘buildExpressionParser’ → ‘makeExprParser’
* ‘GenLanguageDef’ → ‘LanguageDef’
* ‘GenTokenParser’ → ‘Lexer’
* ‘makeTokenParser’ → ‘makeLexer’
