Tim Wojtaszek 9cb3c30a28 Transform streams (#546)
This adds scene graph support to XVIZ through the use of the new *links*
entry in the state_update message.

- Support parsing of links
- Add link support to xviz-stream-buffer
- Add link support to synchronizer
- Add links to protobuf and round-trip tests
- Add scenario demonstrating links in "scenario-orbit"
2019-11-11 11:30:49 -08:00
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2019-11-11 11:30:49 -08:00