PHYS-16 #time 25m #comment Made some basic getters const as a baby step
to more "const-ness" in my program. Torched the dumb
get[pos|momentum|velocity] functions that returned vanilla pointers.
PHYS-1 #time 10m
Revert "PHYS-16 #time 25m #comment Made some basic getters const as a baby step"

This reverts commit ee90607c3ab429c4a29cb36e4d5b72e010052cd5.
Merge branch 'PHYS-16' into PHYS-1
PHYS-1 #time 25m #comment Fixed broken nonRandom simulation. Wasn't
initiliazing the z component of the positions.
PHYS-1 #time 25m #comment Need to figure out how to handle object
destruction in mergeObject code.