Mix deps.add functionality

@chvanikoff reading your thread I am/was looking to do the same exact thing you are. We should talk about it some more.

I was talking to @fishcakez about automating GitHub - ElixirCommons/ElixirProjectChecklist: New Elixir Project Checklist, formating, versioning, debuging, documentation, code coverage, package publishing, testing · GitHub

I am referencing the other thread here: Parse Elixir Module AST to replace functions and replace the original source file? - #5 by Eiji