Compile warning in Elixir 1.4

[developerworks]

==> tirexs
Compiling 28 files (.ex)
warning: the Behaviour module is deprecated. Instead of using this module, use the @callback and @macrocallback module attributes. See the documentation for Module for more information on these attributes
  lib/tirexs/dsl/behaviour.ex:7: (module)
  (elixir) src/elixir_compiler.erl:125: :elixir_compiler.dispatch_loaded/6
  (elixir) src/elixir_module.erl:191: :elixir_module.eval_form/6
  (elixir) src/elixir_module.erl:71: :elixir_module.do_compile/5
  (stdlib) erl_eval.erl:670: :erl_eval.do_apply/6

[OpakAlex]

@developerworks PR welcome! ;)