R=golang-dev, r CC=golang-dev https://golang.org/cl/4897048
It's already in old/template; make that build. Update a couple of references to point to the old template. They can be updated later. Update goplay to use exp/template. R=golang-dev, dsymonds CC=golang-dev https://golang.org/cl/4902046
Fixes #1444. R=rsc, r CC=golang-dev https://golang.org/cl/3979045
R=r, rsc, gri CC=golang-dev https://golang.org/cl/887045
