misc: add zsh completion (using compctl)
misc: add zsh completion (using compctl)

R=golang-dev, rsc1, rsc
CC=golang-dev
http://codereview.appspot.com/2061042

Committer: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go