doc: add godoc badge
doc: add godoc badge
go-python/gopy,go-python/gopy,go-python/gopy-gen,kellrott/gopy,lifei/gopy,ericsnowcurrently/gopython-gopy,ericsnowcurrently/gopython-gopy,kellrott/gopy,lifei/gopy,go-python/gopy-gen