Revise suspension model
Re-implement corrections to the model from !61 (closed).
- Upper joint temperature comes from the stage above
- Drop support for BQuad suspension type
- Use the fiber end cross-section consistently in wireTELoss()
- Remove the "questionable approximation" in continuumWireKh
- Correct the spring constant calculation in continuumWireKv
Edited by Jameson Rollins