Move LOCKDOWN check from facility (?) to distributed (of course)
Initial pass at #1644 and #1701 - break up settings, move validation and loading into __init__
Getting static files to work.
Removing dependency on kalite.testing, smaller dependency on fle_utils.testing.
Eliminate the # of times settings needs to be loaded in different ways.
Fixing up comments
Merge branch 'develop' of github.com:learningequality/ka-lite into 1644

Conflicts:
	kalite/settings.py
Merge pull request #1703 from bcipolli/1644

Separate settings.py by app