More version parsing. Moved additional version info into release

This precents .RC versions from having higher priority than the release
Renamed omero-initdb.sh to omero-firstrun.sh since it does more
Another createdb locale attempt. Don't turn omero service on by default.
Changed back to using /opt/omero as the OMERO root directory
Added dependencies to pyslid
Tweaked the postgres setup script again
Change back to /opt/omero, attempt to auto-configure omero.web.apps
Added omero-web restart to %post