Added __str__ functions for configure
Added __str__ functions for configure

- Added an 'open' method to read configs from a JSON file


Former-commit-id: 3e72165d5d117ee7d7052e00b98e189ed7856ffc
hnunner/PyOpenWorm,openworm/PyOpenWorm,gsarma/PyOpenWorm,kaustubhcs/PyOpenWorm,openworm/PyOpenWorm,travs/PyOpenWorm,gsarma/PyOpenWorm