Changes

v0.03

Threw out the old graphics/world engine; now using WorldEngine (v0.04).

Now contains the following demos:

Coulomb's law
Electric field
Pendulum (fixed!)
Kinetic "cursor" (new)
Gravity (WIP)
Solar system (way more awesome!)

v0.02 (6/16/2012)

Added simple Solar System demo.

v0.01 (6/16/2012)

Initial import. Contains the following physics simulators:

Gravity
Collisions
Buoyancy
Electric field (acting on charged particles)
Coulomb's Law
Piston
Sandbox: collisions, starting velocity, mass, and/or gravity