First round of initial DB changes ... working on the provider => skill and seeker => activity relationship next.
The portion of back-end code related to adding a skill to a user (provider profile) has been added and seems to be working with navigation.
Ok, activity creation and basic navigation appear to be working (user => activity list, activity => activity skill list).
Pulling in master changes (search) to the database model changes and merging them together in the db model branch (prior to merging to master)

Conflicts:
	talent_match/views.py