Based in part on http://d.hatena.ne.jp/antipop/20110508/1304838383 Usage: (require 'flymake-coffee) (add-hook 'coffee-mode-hook 'flymake-coffee-load) Executes "coffeelint" if available, otherwise "coffee". Uses flymake-easy, from https://github.com/purcell/flymake-easy