The addition of S15!

This has been worked on for a few days now, and it would seem at this
point it's better to let everyone have edit access than to keep the
control to myself.

Original gist, which contains a slight bit of revision history for the
file: https://gist.github.com/lue/7761244

Of note is that this spec is in Pod6, because that's the version of Pod
I'm familiar with, I can't be bothered to convert to a far less familiar
POD at the moment, and frankly the specs should be in Pod6 in the first
place :) .