Main, initiateBidding, fix ups

-Fixed up setupGame with parameters so we can pass it player objects of
different types to play against eachother.
-Finished initiateBidding (and added a nextBid function to help grab the
next bid)
-Finished playTrick.
-Updated DummyPlayer to actually return a GameTypeOptions object instead
of null.
-Changed Main to actually specify round count and play.