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.
Aren't markers affixed to a Frame? Wouldn't it be more useful to know what Frame it is on. Since a Body is a Frame whatever was getting and setting Body should still be happy.