Change floorplane

Added floor plane and got rid of walls.
Merge branch 'master' of github.com:alexicon3000/MaterialsIntensity

Conflicts:
	bin/ofxBulletEventsExampleDebug.app/Contents/MacOS/ofxBulletEventsExampleDebug
	ofxBullet_EventSquirrel_ALEX.xcodeproj/project.xcworkspace/xcshareddata/ofxBullet_EventSquirrel_ALEX.xccheckout