doc: add Sydney University video, fix hlint warnings
doc: add Sydney University video, fix hlint warnings

R=r, r2, rsc, uriel
CC=golang-dev
http://codereview.appspot.com/2433042
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go