collide with floor vertical, and collide with landed piece vertical,
generates new piece after land
Merge branch 'master' of git@github.com:andrewoid/cooperative-tetris.git

Conflicts:
	src/edu/touro/cooptetris/Board.java
	src/edu/touro/cooptetris/pieces/Piece.java
	test/edu/touro/cooptetris/BoardTest.java
Using BoardView (not complete)