Added a neuropeptide property to the Neuron class
Added a neuropeptide property to the Neuron class


Former-commit-id: 293762be1ee55ae8a3913120ac7938bb2a4c27ac
hnunner/PyOpenWorm,gsarma/PyOpenWorm,travs/PyOpenWorm,openworm/PyOpenWorm,kaustubhcs/PyOpenWorm,gsarma/PyOpenWorm,openworm/PyOpenWorm