@inlineCallbacks eats the current exception
Actually call the setUp method
Add a review note
Whoops, this should get a conn injected

This was actually caught by verifyObject. Yay interfaces!
Now we *do* implement all methods (they just don't work yet)
Explicitly extract items from the event dict

This helps satisfy naming conditions
Explicitly AUTOINCREMENT scheduled event primary key
group_id is *not* part of the primary key
The in-memory SQLite database is *synchronous*
Refactor create_group to be less magical
Fix adding cron events in the test
In schedules it's called "size" not "limit"
happens_on -> happens_at
Add policy_id to scheduled_events table
Add a review note about denormalization
Also store the policy id
Refactor _create_policies
Minor test cleanup
Finally a failing test for showing other user's stuff!