Add support for Elixir.

sources_non_forked/vim-elixir/compiler/mix.vim

@@ -0,0 +1,16 @@
+if exists('current_compiler')
+    finish
+endif
+let current_compiler = 'mix'
+
+if exists(":CompilerSet") != 2
+    command -nargs=* CompilerSet setlocal <args>
+endif
+
+CompilerSet makeprg=mix\ compile
+CompilerSet errorformat=
+            \%Wwarning:\ %m,
+            \%C%f:%l,%Z,
+            \%E==\ Compilation\ error\ in\ file\ %f\ ==,
+            \%C**\ (%\\w%\\+)\ %f:%l:\ %m,%Z
+