Add a Python-oriented .gitignore file.
Add Django project skeleton.
Add control module skeleton.
Add tests for the basic control bot.
Implement basic control bot story.
Force unicode string literals on Python2.x
Refactor plaintext warning email into a template.
Fix Python3.x incompatibilities.

- All imports must be absolute
- Some functions expect bytes instead of str in Python3.x
- Must consistently decode email content in the tests
Fix X-Loop test.
Fix processing to discard messages based on X-Loop
Merge branch 'control-bot-basic' into develop
Add a template for the local_settings.py file.
Add basic test for subscribe to package story.
Refactor control command processing.

All control commands are now defined and implemented in a separate
module, commands.py
Basic subscribe to messages tests pass.
Implement random confirmation keys.
Refactored the confirmation email to a template.
Add core module and initial models.
Refine the test for the subscribe command.
Implement saving subscriptions to a DB.

The subscribe command now properly saves a subscription to
the DB.