* Note that core kuma devs use this method.
* Don't insist on using gem, while pointing to vagrantup.com, since they
recommend using DMGs
* Advice again using the same working directory as for the local
installation, since that wipes out settings_local.py and breaks
because of symlinks (e.g. media/uploads) that are host-dependent.
* Fix the puppet manifest filename to match reality (dev-vagrant.pp)
* Mention dekiwiki availability, link to development.rst