DRACOLoader: Move Draco libs and add readme.

Changes required as a result of #13277

OrbitControls example: modify scene

Add option in blender exporter to bake keyframe animation

Transform controls vs transparency vs fog

Docs: Visible type information.

This reverts commit fca1c627.

 separates light entities shaders from light maps shaders 

GLTFLoader: Implement KHR_draco_mesh_compression

ColladaLoader: Improve parsing of distance unit

EXAMPLES: converted QRCode.js to QRCode.json

EXAMPLES: delete old cubecolors folder

fix NodeFrame (webgl_materials_compile)