code cleanup and PEP8
code cleanup and PEP8

steptools/NC.js,metamorph-inc/cad.js,steptools/StepNCViewer,ghemingway/cad.js,steptools/NC.js,steptools/NC.js,metamorph-inc/cad.js,steptools/StepNCViewer,ghemingway/cad.js,ghemingway/cad.js,metamorph-inc/cad.js,steptools/StepNCViewer