Add support for the param and return tags
Add the rest of the standard pattern tags
Add separate highlighting for type list punctuation
Alphabetize and clean up
Add support for multiple type lists
Fix patterns to not match bare @ in comments
Fix name of grammar in spec
Add simple spec for validating YARD doc comments
Add the rest of the tests

Also fix a bug in the include of the tag-comment pattern.
Merge pull request #53 from lee-dohm/yard-highlighting

Add syntax highlighting for YARD documentation comments
Allow regular expressions to start with { and }

Closes #47
Tweak regular expression end lookahead

Attempts to prevent arithmetic expressions from being parsed
as regular expressions.

Closes #55