Clarify compile-time dependencies on module attributes
Clarify compile-time dependencies on module attributes

pedrosnk/elixir,elixir-lang/elixir,kelvinst/elixir,michalmuskala/elixir,pedrosnk/elixir,kimshrier/elixir,kimshrier/elixir,ggcampinho/elixir,joshprice/elixir,ggcampinho/elixir,kelvinst/elixir