fix error "module 'chumpy.ch' has no attribute 'tensordot'"
fix error "ValueError: cannot reshape array of size 2702970 into shape (846,846,3)": in renderer.py xxxx.reshape(self.frustum['height'],self.frustum['height'],3) is wrong, which should be modified as reshape(self.frustum['height'],self.frustum['width'],3)
fix error "AttributeError: 'ColoredRenderer' object has no attribute 'vn'"