Big update:

1) Bubbles squish! Albeit not perfectly, but its a start. Sometimes the bubbles disappear when you rotate one around another. I think this
occurs when one of the angles (starting and ending) is above PI and the other is below. More research/debugging needed.

2) Up next:
	A) More comprehensive hit testing, especially to detect overlapping shapes. (hit testing individual points is easy)
	B) Resolving collisions completely, which means clearing old constraints so that the shapes can return to normal.
	C) Beginning the physics engine abstraction?
	D) Sync redraws with refresh rate of the screen. (CADisplayLink (??) class)

3) Longer term:
	A) ENDOCYTOSIS. The real game changer.
	B) The opposite of ENDOCYTOSIS
	C) Port CrpytoGenerator, and start playing games!
	D) $$$$