Setting tag vsys-scripts-0.95-35

Added a script for users to create custom distributions within their slices. Use as follows:
mkdir /rootfs;cd /rootfs
wget <your distribution tarball>
tar xvfz <tarball>
[copy in PlanetLab /etc/resolv.conf and /etc/passwd files. mkdir /var/run; mkdir /var/lock]
cat /vsys/switcheroo.out &
echo 1 > /vsys/switcheroo.in