grabbed good treeExample.txt from old-models branch
fixed up active wheg, so looks proper and is aligned with physical model
fixed up active wheel to work with new model
revert to just show geom in debug mode
updated placement of passive wheel so sits properly
adding no-obstacles file for convenience
updated ActiveCardanRenderModel to work properly with new models
more fixing of the cardan for new models
fixed up active hinge for new model
merged in and tested new models