allow .dds files to load from collada
some changes to allow gltf to load

Conflicts:
	support/proxy/vwf.example.com/animation.vwf.yaml
fix uv loading in GLTF, use BuggerGeometry
fix loading of glsl files, which hangs some browsers
revert the change in load order, allow VWF to issuse parallel loads as normal now. Queue up entry into the gltf loader
fix animation system to avoid cases where the animation duration is 0 falsey
don't flip textures of nondds files
Made the "threejs/js/loaders/gltf" folder references consistently lowercase in vwf.js
Remove debugging line from model/threejs.js
Add some spacing to stay consistent ... at least somewhat  ;o)
Remove animationDuration backstop that is no longer necessary

Now we deal with animationStop being 0, so we no longer need a default value when it is actually 0.  There is still some improvement that we could make to this behavior, though.
Fix a typo in a comment
Merge pull request #364 from virtual-world-framework/dds_gltf

Dds gltf