New tournament: Gauntlet (assign random preconstructed deck to each player)

http://magic.wizards.com/en/MTGO/articles/archive/pro-tour-gauntlet-oath-gatewatch-details-2016-02-09

MTGO had an event where 8 players join a tournament and are assigned a random deck from a list of 16 and play with that.

Start by reviewing the linked MTGO article to clarify the Gauntlet rules and the intended 16-deck pool. Then locate the tournament and deck-assignment entry points in the Java game engine. Done means an eight-player event can assign each player a random preconstructed deck and run the described tournament.

Written by the indexing model from the issue text.