Added text on JSON descriptions of Python operators
Added text on JSON descriptions of Python operators

cjh1/tomviz,mathturtle/tomviz,OpenChemistry/tomviz,OpenChemistry/tomviz,OpenChemistry/tomviz,mathturtle/tomviz,cjh1/tomviz,cryos/tomviz,cjh1/tomviz,mathturtle/tomviz,OpenChemistry/tomviz,thewtex/tomviz,thewtex/tomviz,thewtex/tomviz,cryos/tomviz,cryos/tomviz