Add 'api' to settings.py.

It seemed to work without, but it's probably
better in there.
Add example (dev) local_settings.py
MatchForm: ensure next matches are in tournament
Change TournamentDetail data for API compatibility
Change app name: openra_stats -> compo
Add home page
Better height adjustment for tournament detail.

Now considers height of loser bracket and finals.
Re-add tourn migrations
Add Team.short_name field
Change base template title and navbar
Use Team short names where available
Shorten Team.short_name field