Let nrgpio code work with python 3
Let nrgpio code work with python 3

(just in case that becomes default)

node-red/node-red,namgk/node-red,node-red/node-red,btsimonh/node-red,btsimonh/node-red,HiroyasuNishiyama/node-red,HiroyasuNishiyama/node-red,HiroyasuNishiyama/node-red,mw75/node-red,mw75/node-red,mw75/node-red,mw75/node-red,node-red/node-red,namgk/node-red,btsimonh/node-red