Add coffescript syntax highlighting

imported lexer from Scintilla and added coffeescript filetype
coffeescript: Recognize string and comment styles
Fix Scintilla patch for CoffeeScript inclusion
coffeescript: Import last lexer version from Scintilla HG

This fixes handling of "/*" and removes dead code.
Merge branch nullEuro/coffeescript-ft

Add CoffeScript syntax highlighting.

Closes #230.