Add a few commands for sentry
Merge remote-tracking branch 'origin/master'

* origin/master:
  Switch to the newest and bestest releases
  Clarify
  Absolute imports and unicode literals
  Success messages
  Expand a bit on requirements for installation, add "fab setup"
  Latest versions

Conflicts:
	requirements/base.txt
Add CFLAGS/CPPFLAGS for compiling Pillow on OS X 10.9