Removing securesync to add as a subtree
Squashed 'python-packages/securesync/' content from commit a479fa6

git-subtree-dir: python-packages/securesync
git-subtree-split: a479fa61e95c4c1db2b67c439444b4bb287f0958
Merge commit '0892f44fad2a5e1578d75c0238b9bf03bf3900a1' as 'python-packages/securesync'
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 #1694 from bcipolli/securesync-subtree

Moving securesync into its own repo, adding to ka lite as a subtree
Merge pull request #1703 from bcipolli/1644

Separate settings.py by app