Missing language definitions for CSS and HTML

[jayvdb]

[Kawzeg]

KeywordBear fails on CSS and HTML because their Language definitions are missing comment_delimiters.

[jayvdb]

CSS wont be a problem, but HTML is a harder problem. See the XML definition here in coAST, which is also incomplete because of similar problems.

We dont have a design that supports YAML or XML-ish languages.