two vital errors when using this project. 

When using this project, i met two vital errors when trying to visualize the human mesh. First, the type check code. The additional command  type make it impossible to input the PIL.Image.
`        elif isinstance(im, type(Image)) and isinstance(iuv, type(Image)):
            im = im
            iuv = iuv`
Second, why the iuv should be multiply 255? This behaviour cause huge confusion.