Moved GOOGLE_API_KEY to prod.py

This is so that local development api keys can be used in development by
placing them in local.py
Added functional_tests
Added function_test app. Added SignUpTest
Switched over to using StaticLiveServerTestCase
Fixed up test structure and added SignInTest
Added AddUpdatePlaylistTest
Added home app. Unit test passes.
Added home page render check
Refractored home page to use the template
Added more copy to the home page. FTs now pass
Added test to check for correct html
Added test login_required
Unit test for playlist_add POST
Wrote unit tests for instantiating new model
Refractored _create_user
Refractored: _create_playlist
Added test for fetch_videos
Added test_viewing_playlist
Added test_list_playlists
Refractored _create_playlist