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.
@msdemers , as we now know, if you wanted this could instead be

```
FixedFrame(const RigidFrame& parent_frame, const SimTK::Transform& xform) : FixedFrame() {
setParentFrame(parent_frame);
}
```

Not necessary though, since we don't follow this pattern in general.