Update physics samples to run on devices

Updated the physics samples, box2d and chipmunk so that they scale to
multiple resolutions and respond to touch events.
Add box2d and chipmunk initialization to android host

Box2d and chipmunk were not initialized so it would not work on
android.  Add AKUFinalizeUtil and AKUFinalizeSim as they were missing.
Fix physics on ios

Initialize chipmunk and box2d on ios so that physics works.  Add
missing finalize of util and sim.
Merge pull request #771 from JandyCo/host-physics

Fixing physics on iOS and Android