scrooloose/syntastic — pull request #715 by thomas-holmes (2013-07-05 21:18:47+00:00)
Title: Fix Elixir `mix` detection

Detection of a mix project was not very robust. I refactored some code out from haxe.vim and am using it in elixir.vim as well to find out if the file we are in is part of a mix project.