Modified convsp_example.py to reflect that the channels dimension now comes last for data in ConvSP and ConvSDF.
Modified convsp_example.py to reflect that the channels dimension now comes last for data in ConvSP and ConvSDF.

cschenck/SmoothParticleNets,cschenck/SmoothParticleNets,cschenck/SmoothParticleNets