Bracket

Progress in tournament functionality: bracket and group stage pairing
- Models for Tournament, TournPair, TournUser, TournDeck
- instance methods in Tournament: initiate_bracket, initiate_groups(int)
       *tests for these methods in tournament spec
- basic views for testing tournament creation and bracket viewing
`end` at 19, 2 is not aligned with `respond_to do |format|` at 12, 4