Moving securesync into python-packages
Initial pass at #1644 and #1701 - break up settings, move validation and loading into __init__
Merge pull request #1703 from bcipolli/1644

Separate settings.py by app
Copying securesync templates to securesync app.
Fixed double messages issue.
Use Django's unittest to enable @unittest.skipIf on python2.6.
Need to continue skipping securesync tests.
Avoid warning in securesync (due to different import styles of same models module)
Logging warning re: syncing models is really a note; treat it as such.