Update to Ubuntu raring (13.04), iRODS 3.3 and newer releases of Vagrant VirtualBox

* Changed to distribution's packaged PostgreSQL instead of custom iRODS-managed one. Aligned with enterprise irods (http://e-irods.org/).

* System Paths aligned with e-irods and <a href="http://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard">Linux's FHS</a>.

* Newer versions of vagrant don't support VagrantFile's forwarding. Fixed.