Added working, but buggy, interpolation

When it reaches a certain point, the rotation interpolation rotates -360 degrees instead of the way it is
supposed to.  Also, the position interpolation seems to misjudge the distance a bit.
Fixed bug with spastic translations and rotations - however, the 360 degree rotation bug is still not fixed

The fixed bug occured because every time a transmission was received, all the deltas for all the entities
were computed.  This resulted in the interpolation transformations to be perceived as a delta from the server
when only other Entities were being updated.  These would compound rapidly, causing objects to fly off the
screen.
Fixed the -360 degree turn bug - still some minor bugs, but I think I'll leave it be for now