Added vim-commentary and updarted the plugins.

commentary:
Comment stuff out.  Use `gcc` to comment out a line (takes a count),
`gc` to comment out the target of a motion (for example, `gcap` to
comment out a paragraph), and `gc` in visual mode to comment out the
selection.  That's it.

sources_non_forked/vim-snippets/snippets/elixir.snippets

@@ -50,6 +50,9 @@ snippet case
 		${0}
 	end
 
+snippet df
+	def ${1:name}, do: ${2}
+
 snippet def
 	def ${1:name} do
 		${0}