Matt ayman frames

Redo of the merge of Frame, RigidFrame, FixedFrame, Station and Marker ModelComponents along with code to convert Marker to new format for serialization/deserialization and inclusion of FrameSet in model.
@sherm1 @msdemers @aseth1 or @chrisdembia Please review and let us know your feedback.
> I should be able to slap on Frames to any MobilizedBody without an OpenSim::Body

Since MobilizedBodies are part of the throw-away Simbody System, that would imply that Frames are not part of the OpenSim Model. That doesn't seem right to me if they are ModelComponents.