Added a serialization (trix) source
Added a serialization (trix) source


Former-commit-id: fb361fb1b44128b2db4a086aa5c3311259ba947e
openworm/PyOpenWorm,travs/PyOpenWorm,kaustubhcs/PyOpenWorm,openworm/PyOpenWorm,gsarma/PyOpenWorm,gsarma/PyOpenWorm,hnunner/PyOpenWorm