Changes to make 1.8 release build. In particular: - Custom Simbody build (libs and header) to include 1.5.1 +Weld Joints + reaction fixes - SimmToOpenSimm handling from GUI so that old models with SimmKinematicsEngines are handled properly.
Changes to make 1.8 release build. In particular:
- Custom Simbody build (libs and header) to include 1.5.1 +Weld Joints + reaction fixes
- SimmToOpenSimm handling from GUI so that old models with SimmKinematicsEngines are handled properly.

git-svn-id: 9e047e1e624cce0a2485e750063112e834f85522@4652 fc29be9c-2cb0-420d-b520-73dbd18add6e

opensim-org/opensim-gui,opensim-org/opensim-gui,opensim-org/opensim-gui,opensim-org/opensim-gui