Made the industrial engineering test cases faster by moving fixtures to a one-time set up function.
Fixed up all the development files to easily recreate a dev environment.
Merge branch 'master' of github.com:AeroNotix/django-timetracker
Added a test for activity utilization calculation.
Added pragma no cover to caching code  in ActivityEntry.
Removed because the code to check the activity is none will always be performed within the activity check and is now redundant.