This adds custom set group support for users that might not have the
feature (I think it might only exist in RHS) and also to users who want
to add their own custom groups! Please ping me if the stock groups gain
or lose parameters, or if their set values change!

This adds support for setting volume set groups which are groups of
properties that are set all at once on a volume. This is managed in a
clever way, so that if the definition of what a certain group contains
gets updated by the package manager, your volumes will get updated too,
on the next puppet run.

It seems the seluser is now server_t. If someone thinks it should be
different, please let me know!

I think the --xml output of gluster volume status --xml <v> changed.

Puppet-Gluster, now with Vagrant! - Initial release. Happy hacking!

Not sure how this bug ever happened. Did the format of the xml ever
change? In any case, now it's squashed.