These were only used by rake, and we haven't used rake in a year.

Note: this requires SASS 3.3+ so do ```bundle install```

  - django debug commented out in lms/envs/dev.py (temporarily - need cleanup)
  - email backend set
  - index page modified for edx4edx

* Make sure we're installing django-pipeline from our fork
* Bump rake to 0.9.2.2, as 0.8.3 is already outdated.

Don't pipeline in dev environment, which means that there is no need to run collectstatic either. Hooray\!

You can run this by do:

    bundle install (first time only)
    bundle exec guard