Added section on dependencies of dependencies to Mix docs.
Merge pull request #72 from n1rvana/master

Added section on dependencies of dependencies
Move new section to 1.4.5
replaced highlight ruby with highlight elixir
Merge remote-tracking branch 'upstream/master'

Conflicts:
	getting_started/mix/2.markdown
Update docs on deps of deps, app deps started by the app.
Merge pull request #73 from n1rvana/master

Update code blocks to use elixir highlighting
Update 1.markdown

Fix tabs