Rename "Force" to "Actuation".

(to make naming more consistent and descriptive; including functions such as getForce, setForce,
computeOverrideForce, overrideForce, isForceOverriden, setOverrideForce, getOverrideForce)
If time isn't being used in this method all this is mute. I would delete it.
Instrumenting the compute time seems useful for testing but we don't use `QueryPerformanceCounter` anymore- we just use `std::clock_t startTime = std::clock();`, for example.
I would delete the commented out code.