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
Fixed #217. Remove (via Newsblur) when sharing
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.
Merge branch 'master' into circular

# By Piotr Mitros (5) and others
# Via Samuel Clay (2) and Daniel (1)
* master:
  Normalizing settings.
  Fixed #217. Remove (via Newsblur) when sharing
  Documented additional hack to get into the system without Stripe installed
  Expanded requirements
  Fixed doc. We do require a non-fake migrate as well.
  Removed SES dependency for development. Fixed bug where DEVELOPMENT was used before being overridden by local_settings.py.
  Added requirements.txt
Adding maintenance mode message to ios app.