Support frame-by-frame control
Support frame-by-frame control

Adding an additional class method to startup a simulation without the timer based loop.  Adds a next_frames method allowing iteration over 0 or more frame updates.
AntonSynytsia/MSPhysics,AntonSynytsia/MSPhysics,AntonSynytsia/MSPhysics,AntonSynytsia/MSPhysics,AntonSynytsia/MSPhysics