Updated to jazz 0.2.0 to update support for elixir 0.15.0
Merge pull request #237 from aforward/f/updated_jazz_dependency

Updated to jazz 0.2.0 to update support for elixir 0.15.0
Updated documentation to point to elixir 0.15.0
Merge pull request #239 from aforward/f/updated_elixir_dependency

Updated documentation to point to elixir 0.15.0
Remove Project.root_path and use File.cwd! instead
Merge branch 'master' of github.com:chrismccord/phoenix