Added requirements.txt

This allows you to:
  pip install -r requirements.txt
Removed SES dependency for development. Fixed bug where DEVELOPMENT was used before being overridden by local_settings.py.
Fixed doc. We do require a non-fake migrate as well.
Expanded requirements
Documented additional hack to get into the system without Stripe installed
Merge pull request #222 from manderson23/master

Android: Remove (via Newsblur) when sharing
Merge pull request #221 from pmitros/master

Slightly simplified development install
Normalizing settings.
Adding redis backup script.