Fix uninitialized variable jointDamping/jointFriction in SDF importer
Add SDF <pose> parsing in visual, inertial, collision elements.
Slight improvement in TinyRender loading performance of largish meshes (30k vertices)
Reduce #define MAX_SDF_BODIES to 500, due to some issue in client code, todo: figure out what the issue is.
b3RobotSimAPI support SDF file loading
Tiny improvement in OpenGL hardware renderer lighting, to distinguish faces without textures
it works without OpenGL dependency now, so it runs in the cloud :-)
Add scaling support for TinyRenderer, remove some un-used normal mapping in TinyRenderer shader, expose light_dir_world,
remove accidental hard-coded path in tga write_tga_file,
Fix InverseDynamicsExampleCreateFunc, enum has to start at 0
