Note that you need to add this package to your
`services.udev.packages` list rather than your
`environment.systemPackages` for the udev rules to take effect.
It might be worthwhile giving this its own configuration option, which
could be documented in `man configuration.nix`.
This will probably be mandatory soon, and is a step in the right
direction. Removes the deprecated meta.version, and move some meta
sections to the end of the file where I should have put them in
the first place.
