Setting Django file serving to DEBUG only

1. As part of moving to production, swapping to using Django's static file serving only for DEBUG enabled runs.
2. Moving to production file serving for production deployment.
Removed virtualenv directory
1. This was added early on in the process, but doesn't really belong as part of the project.
Added a more interesting initial data set

1. Got data from the last 3 years of NFL games and loaded it into a fixture.
2. Moved the old initial data to stock_data.json, and put the NFL data in initial_data.json.
3. Fixed a problem where the team_league_matches page wasn't showing elos for the team that played for all data points.
4. Updated forms.py/models.py/misc.py to allow users to specify when a match happened so that they can input past matches.
5. Fixed the settings path in manage.py.