Beginning to reorganize examples:
- Combined SimTKmath and SimTKsimbody examples
- Moved all examples to top level examples subdirectory rather than under individual libraries
- Fixed CMake files as needed
Add a "shared" directory for examples to avoid multiple copies of code or geometry that is used by more than one example.
Nothing in it yet.
Add new subdirs for multi-file examples.
Moved example files into new subdirs; removed unneeded dummy files.
Rename model files to get rid of now-spurious Gazebo_ prefix.
Make subdir for Humanoid task space example.
Move files around for task space humanoid.
Fix typos in comments.
Change debug output for MassProperties to make it clear that it is displaying a UnitInertia rather than an Inertia.
- Initial check-in of Atlas task space control example.
- First cut at trying to get the examples to be able to find their extra files whenever they are run.

Both of these are still works-in-progress.