Add local device metadata to device_management page
Reorg code for device metadata to control_panel (for import consistency).  A few tweaks to the admin panel.
Initial refactoring (may be broken)
updating schema (and content) of version file
Merge branch 'update_version_schema' into add_device_metadata
disallow viewing of local metadata for central server
Move delete_zone to central / org management (as redirect goes there; it's really a central-only action at this time)
Refactoring code fully, removing cruft, documenting TODOs
Merge branch 'update_version_schema' into refactor_control_panel_context
Enable viewing without being on any zone.
Don't know (yet) why this is needed, I just know that it is!
Merge branch 'refactor_control_panel_context' into open_access_control_panel
Add last_activity_datetime, to track in a more fine-grained fashion what's going on.
Adding new fields to control panel queries and templates.
Fix up two refactor bugs.
Merge pull request #952 from bcipolli/ignore_unknown_ids

Ignore unknown logs.  This is important for when exercises or videos get removed from the topic tree.
Merge branch 'hotfix' of github.com:learningequality/ka-lite into release-0.11
Merge pull request #990 from bcipolli/update_version_schema

updating schema (and content) of version file
Update redirects from message, so user is brought to the appropriate page.
Merge pull request #991 from bcipolli/add_device_metadata

Add local device metadata to device management page