Add an Aussie location for apt

To speed up the creation of the provisioning process I'd like to float the idea of using https://github.com/puppetlabs/puppetlabs-apt and an Aussie mirror. I've been using http://mirror.overthewire.com.au/ for my Ubuntu distro on my laptop and it's super speedy.

Thoughts? :thumbsup:, :thumbsdown: or :no_mouth: