Include unsigned models (where signing is deferred) in own zone.
Correct spelling error in assert message.
Use "device.get_metadata()" instead of "device.devicemetadata".

(I was getting an error of it being None, early on in the reg process.)
Wording tweak on zone management page.
Merge branch 'release-0.11' of github.com:learningequality/ka-lite into fix_zone_inclusion

Conflicts:
	kalite/control_panel/views.py
Use _get_own_device instead of re-importing the Device model.
Merge branch 'release-0.11' of github.com:learningequality/ka-lite into fix_zone_inclusion
Tweak to layout/wording of org info section toggle link.
Merge pull request #911 from jamalex/fix_zone_inclusion

Fix "by_zone" method to include models that have not yet been signed due to deferred signing