Update set_bids() docstring
Let players play!

+ Fixes a variety of linter errors
+ Improves Trick.play_card and deleted Player.play_card()
+ Added Trick.who_won() to determine winner of trick
+ Added Trick.sort_for_winner() so that the correct player plays after
taking a trick
+ Added Trick.trick_to_winnter() to increment count of tricks taken
(conent of those tricks is irrelevant for scoring)
+ cleans up list constructions
+ removes unneeded attributes from Deck and Trick classes
+ Update spades.py to use new methods