Rename LanguageKeywords -> LanguageInfo
Add brace-parsing related methods to LanguageInfo and add base class for all c-based languages
Add global table to resolve language types
Refactor content type checks to use new central list
Rainbow Parentheses now works with language-based rules
Add VB support to Rainbow Tagger (Issue #1)
Fix issue #3 with C-based escape sequences
Merge branch 'langref' into develop