Renamed (competition) round to level.
Renamed tourney to tournament in all but package, db and config names.
Renamed tournament to round.
Renamed competition to tournament.
Changed registration from round to tournament.
Removed round-type : multi- and single-game. All rounds are 'multi_game' now.
Removed closing of rounds, only tournaments can be closed.
Improved interface, more info on account page.
Cleaned up scheduling and state.
Lots of small improvements, bugfixes and a bit refactoring.