rename 'version' to 'minversion' for versioned syncing
simpler user experience for registration; now no recurring refresh, window to close--just a callback url.
central-server-side of redirect.  This also forces the sync to run, with no confusion to see that the device has not yet sent sync data to the central server.
Merge branch 'redirect_to_force_sync' of github.com:bcipolli/ka-lite into redirect_to_force_sync

Conflicts:
	kalite/securesync/views.py
adding a command-line utility for executing common testing functions
missing delete function on config.
Merge branch 'develop' of github.com:learningequality/ka-lite into rename_to_minversion

Conflicts:
	kalite/utils/general.py
Merge branch 'develop' of github.com:learningequality/ka-lite into redirect_to_force_sync
new katest management command "clean_db"
preventing central-server regret
__unicode__ function must use u'' format strings (see registration app for an example like these changes.
adding tests
making __unicode__ work on unsaved objects; gracefully failing sign() on unsaved objects
unicode tests for main objects
refactor confirm logic in katest clean_db
Merge remote-tracking branch 'gimick/katest_tool' into katest_tool

Conflicts:
	kalite/management/commands/katest.py
Don't allow people to be invited to headless zones, nor to create any.
Merge branch 'develop' of github.com:learningequality/ka-lite into rename_to_minversion
Merge branch 'develop' of github.com:learningequality/ka-lite into __unicode__support

Conflicts:
	kalite/contact/tests/__init__.py
don't let topic tree collapse when it's empty; always display 'None' for 'selected topics' when empty