backend for handling team history
rework team templates to support details and history
reorder ndb calls to make use of async
use async ndb calls
use partials instead of multiple inheritance for team pages
whitespace fix
properly sort events
Merge pull request #653 from fangeugene/team-history2

Ability to view team history. Fixes #603
Merge pull request #655 from fangeugene/event-type-1

Clean up event types -- Part 1
Merge remote-tracking branch 'upstream/master' into event-type-2