Clarify that MovingPathPoint functions express location in the Frame of the Point.
Clarify that MovingPathPoint functions express location in the Frame of the Point.

opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core