- OBJ converter now has "-b" option for baking materials' diffuse colors into face colors
  (if there are morph colormap OBJs/MTLs, first colormap will be used)
  (material will get "vertexColors" property set to "face")

- Blender importer now bakes JSON face colors into Blender vertex colors

- Loader now handles "material.vertexColors" with more options
    - nonexistant property or false will set material to THREE.NoColors
    - "face" will set material to THREE.FaceColors
    - anything else will get THREE.VertexColors

- fixed bug in JSONLoader where face colors were not properly initialized