Floaters invert Z direction when they bounce off of other floaters.
Added hokey physics.
Added Spring1Scene
Gravity attractor (unit vector towards pull), boxes joined by limit joints.
Spring tests.
orbiter
Looks like cells.
Added y-axis control with roll, moving avg. Blue theme.
Merge branch 'proto12-obstacles'

Conflicts:
	hiSpeed/hiSpeed/Emitters/MoverEmitter.m
	hiSpeed/hiSpeed/MyScene.m