««« CL 5849053 / f68d1d478a97
cmd/godoc: update App Engine README and script for Go 1

R=adg, dsymonds
CC=golang-dev
https://golang.org/cl/5849053
»»»

Also applied !appengine build constrain to main.go from CL 5969063
so that the godoc app at release-branch.go1 will build and work properly.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/6112063