Remove the nonwin.go file because it causes a problem with GoDoc.  GoDoc will default to GOOS=linux, so when this file is present, the package becomes empty.  Changing it to a windows only package fixes the issue.
Remove the nonwin.go file because it causes a problem with GoDoc.  GoDoc will default to GOOS=linux, so when this file is present, the package becomes empty.  Changing it to a windows only package fixes the issue.

CodyGuo/walk,jtwatson/walk,tajtiattila/walk,dayed/walk