Adding (Ruby) Haml linting support.
Adding (Ruby) Haml linting support.

uschmidt83/SublimeLinter-for-ST2,SublimeLinter/SublimeLinter-for-ST2,uschmidt83/SublimeLinter-for-ST2,biodamasceno/SublimeLinter-for-ST2,tangledhelix/SublimeLinter-for-ST2,benesch/sublime-linter,benesch/sublime-linter,biodamasceno/SublimeLinter-for-ST2,SublimeLinter/SublimeLinter-for-ST2,tangledhelix/SublimeLinter-for-ST2