fixed zeptorc file and added elixir highlighting

vimrc

@@ -90,6 +90,7 @@ Bundle 'digitaltoad/vim-jade'
 Bundle 'zepto-lang/zepto-vim'
 Bundle 'hellerve/luna-vim'
 Plugin 'rust-lang/rust.vim'
+Plugin 'elixir-lang/vim-elixir'
 
 " Custom bundles
 if filereadable(expand("~/.vim.local/bundles.vim"))