spelling: s/succesfully/successfully
Add docstring
Cleanup: Import just what we need

Arrange this to reduce the references to siteconfig, in order to ease a
little the task of dropping djblets siteconfig.
Cleanup: Do not use baseurl's l here
Cleanup on template dropped by Evernote
pootle_store: Drop an unused import
pootle_store: Add database-level stats and update them on Unit.save()
pootle_project: Clean up views.overview
pootle_project: Fix some template quoting abuse
pootle_store: Use database caches for stores instead of sum_column()
pootle_store: Override all of the TreeItem get_*_wordcount
pootle_translationproject: Store wordcount cache values