Update to run the FUM with Plesk 11.5

To use my updatescript, do the following steps

1) Navigate into the directory of the FUM (z.B: cd /opt/psa/admin/htdocs/fum)
2) wget http://www.haggybear.de/download/fum_psa11_update.sh
3) chmod 755 fum_psa11_update.sh
4) ./fum_psa11_update.sh