doc: update contrib.html to be more enticing doc: refer to golang-dev instead of -nuts in contribute.html
doc: update contrib.html to be more enticing
doc: refer to golang-dev instead of -nuts in contribute.html

R=r, rsc
CC=golang-dev
http://codereview.appspot.com/4309043
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go