rgrove/crass: A Ruby CSS parser that's fully compliant with the CSS Syntax Level 3 specification.

A Ruby CSS parser that's fully compliant with the CSS Syntax Level 3 specification.Pure Ruby, with no runtime dependencies other than Ruby 1.9.x or higher. Tokenizes and parses CSS according to the rules defined in the 14 November 2014 editor's draft of the CSS Syntax Level 3 specification. Extremely tolerant of broken or invalid CSS. If a browser can handle it, Crass should be able to handle it too. Optionally includes comments in the token stream. Optionally preserves certain CSS hacks, such as the IE "*" hack, which would otherwise be discarded according to CSS3 tokenizing rules. Capable of serializing the parse tree back to CSS while maintaining all original whitespace, comments, and indentation.