Add xkcd:ballmer as an alias for comic 323

[ScottMansfield]

xkcd:ballmer
xkcd:ballmerpeak
xkcd:ballmer peak

should all alias to

xkcd:323

[theckman]

Would you mind re-raising this against https://github.com/gobridge/gopherbot for consideration? I'm going to be archiving this repo.