removed tables we don't use
style fixes to satisfy pylint
cleanup
not querying datastore root on every page view, since the only page that needs it is the status page
removed duplicated email field in UserInfo, and batching up status updates
not using email field in user info properties
only updating users in datastore if their information changes
clarified id field for ndb models
Merge pull request #488 from shatterednirvana/speed-up-dashboard

Performance improvements for AppDashboard
Merge pull request #483 from nlake44/deadcode

removed tables we don't use