Null pointer on neighbors of bricks
Merge branch 'master' of https://github.com/joelSimpson/472-symmetry

Conflicts:
	symmetric-bricks.sdf
sdf
Merge branch 'master' of https://github.com/joelSimpson/472-symmetry

Conflicts:
	Debug/symmetric-bricks.exe
	Debug/symmetric-bricks.ilk
	Debug/symmetric-bricks.pdb
	symmetric-bricks.sdf
	symmetric-bricks.v11.suo
	symmetric-bricks/Debug/CL.read.1.tlog
	symmetric-bricks/Debug/CL.write.1.tlog
	symmetric-bricks/Debug/board.obj
	symmetric-bricks/Debug/brick.obj
	symmetric-bricks/Debug/cl.command.1.tlog
	symmetric-bricks/Debug/link.command.1.tlog
	symmetric-bricks/Debug/link.read.1.tlog
	symmetric-bricks/Debug/link.write.1.tlog
	symmetric-bricks/Debug/main.obj
	symmetric-bricks/Debug/symmetric-bricks.log
	symmetric-bricks/Debug/vc110.idb
	symmetric-bricks/Debug/vc110.pdb