Add missing copyright header
Add missing copyright header

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