hooking journalist interface into db when displaying codenames
Adding sqlalchemy and mysql-python to requirements.txt
Display ID for the journalist should be a an adjective + noun pair.
This is more easily memorable for journalists, and does not compromise
security of the system (see issue 95).
Adding a method in db.py:
  regenerate_display_id(filesystem_id) - given the base32 source
  designation, this will initiate a new session and rename the source
  with a new journalist designation

In journalist.py, I've added a new endpoint to utilize the regeneration
db call, then redirect to the document index.

In the journalist template, I've added a new form to hit the endpoint
for regeneration.

Conflicts:
	modules/deaddrop/files/deaddrop/db.py