Typo in OClint checker.
Adds filetype aliases.

This allows checking of files with non-standard filetypes.
Added some registry defaults.
Bug fix: :SyntasticInfo didn't return information for composite filetypes.
Merge branch 'ft_aliases'
Make syntastic#makeprg#build() aware of filetypes.  Fixes #667.
Merge branch 'master' into gcc_refactor