Merge pull request #87 from Tekhne/detect_scripts

Detect `#!` lines using Elixir.

Author: kassio

ftdetect/elixir.vim

@@ -1,2 +1,10 @@
 au BufRead,BufNewFile *.ex,*.exs set filetype=elixir
 au FileType elixir setl sw=2 sts=2 et iskeyword+=!,?
+
+function! s:DetectElixir()
+    if getline(1) =~ '^#!.*\<elixir\>'
+        set filetype=elixir
+    endif
+endfunction
+
+autocmd BufNewFile,BufRead * call s:DetectElixir()