Cleanup bulk email app

fix pep8 and pylint errors

Adam/merge conflicts

Hotfix/release multiple video bug

Skip migrations if running acceptance in fasttest mode

Conflicts:
	cms/djangoapps/contentstore/views/course.py
	common/lib/xmodule/xmodule/tests/test_combined_open_ended.py
	lms/envs/common.py

Fix/adam/add edge reqs

Fix for acceptance test static file issue

Incremented diff cover version to fix 100% coverage bug.

Updated acceptance tests to match new behavior in video captions.

Unanswered on input

Jbau/bulk email faster tests

Adam/calc refactor

Move mitxmako initialization to a startup module

Upgrade newrelic agent to the latest version

Kill processes after running rake

Instrument course email for DataDog

Small change to email registration template

Affects:
Choicegroups, option inputs, textline, and formula equation inputs