Added some TODOs
Refactored activities/views to use get_presidency utility function
Added a utils file to activities, which contains a get_approved_activities utility function
Reorganized tests for activities app
Added tests for get_approved_activities()
Added encoding info for view_tests.py
Added tests for get_approved_activities() with uncommon cases
Added get_rejected_activities utility function with tests
Added get_pending_activities utility function (tentative)
Finalize activity getter functions with tests
Merge branch 'activity-getter-utils' into develop