WIP
worked on #11

Got basic unlocks page “/kw/unlocks/“ which allows users to unlock
previous levels.  Created a “Levels” model which has a many-to-many
with Profile. For simpler tracking of unlocked levels. Could do it via
reading levels that show up but that gets hairy when one meaning has
multiple reading levels. Easier this way and queries are faster too.
Closed #11 (Unlocks Page)

Unlocks page now works. Allows you to manually unlock previous pages.
Currently no warnings or verifications that you're SURE you want to do
it. But it works.
Merge remote-tracking branch 'origin/master'

Conflicts:
	db.sqlite3
	kw_webapp/models.py
Revert "Merge remote-tracking branch 'origin/master'"

This reverts commit 5f8910567d32f00f08cf6bc8f1fb55e2f3f1b7c2.
Merge remote-tracking branch 'origin/master'

Conflicts:
	db.sqlite3
	kw_webapp/models.py
Fixing conflicts in DB