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.
What I mean is that you need a notational convention that can deal with all the ugly things that come up in multibody dynamics, like spatial velocity of A in B but re-expressed in Ground, or a Ground-frame force applied to a body-fixed station. These don't have the nice symmetry of Rotations and Transforms so there may not be a consistent way to extend the "central" notation, while the monogram notation has been used for all of these things. I'm not saying a nice central notation couldn't be worked out -- but I have never seen it done, except in the case of rotations and transforms where it is a very nice fit.