elixir-lang/elixir — pull request #1082 by ericmj (2013-05-16 18:44:08+00:00)
Title: Clean up mix dependency retrieving and converging

Rename Mix.Deps.Project -> Mix.Deps.Retriever.
Retrieve the entire dependency tree in Retriever and let Converger only handle converging.
Don't require setting app: false on umbrella deps.