Provisioning improvements.

* Remove `abook`.
* Separate `base-devel`, `lxde` and `texlive-most` into a "bundle"
  package install path so that the module runs faster w/ minimal checks.
* Add firewall rules for virtualbox loopback interfaces.
* Add vagrant recipe to configure vagrant and virtualbox w/ appropriate
  kernel modules.
* Add `nfs` and `rpcbind` related packages and services.