Added South, psycopg2, and their respective configuration to settings.py
Created requirements.txt
Updated settings.py to use Postgres DB and requirements.txt to use correct
format for dependency tracking
Moved settings.py to pyfit/conf/, separated out default, third party, and
local apps into their own variables and added them to INSTALLED_APPS
settings variable.
Updated manage.py to use new settings.py location
Adding 'pyfitcore' application and initial migration script