initial commit
writes test for player opponents
write failing test for "when points is 2"
writes code to make test for "when points 2" pass
writes failing test for "when points is 3"
writes code to make "when points is 3" test pass
writes code to make "when points is 1" code pass
adds wins_ball method
writes code to make wins_ball test pass
adds failing test for record_wins_game and wins_game
write failing code for deuce
finally wrote correct failing test for deuce
adds failing test for advantage
add passing code for deuce and advantage
wrote failing test for won_game?
created failing test for set_won
add failing test for match_won