updated tests
Merge branch 'master' of git@github.com:andrewoid/cooperative-tetris.git
changed music players to inherit from a base class
Merge branch 'master' of git@github.com:andrewoid/cooperative-tetris.git

Conflicts:
	test/edu/touro/cooptetris/BoxPieceTest.java
	test/edu/touro/cooptetris/JPieceTest.java
	test/edu/touro/cooptetris/PieceTest.java
	test/edu/touro/cooptetris/SPieceTest.java
	test/edu/touro/cooptetris/TPieceTest.java