add insertTrends.py to insert trend data to database

rename some classes to be picked up by py.test

=========Test Instructions=========

Run dbCreation/insertTrends.py

Spot check that it worked by checking 
SELECT * FROM Trend
in the database, and verifying the returned rows against the data that Dr Gary gave us


run py.test

There are currently unit test errors, though, and in things not related to my branch:
Issue 29 details this - maybe you can fix them and commit to this branch before merging to develop?
https://github.com/CST316TeamJ/SportsApp/issues/29