[Seaside] Shell script for pharo on ubuntu 10.10 beta

[fritz schenk]

1. by default shell scripts are not executable in ubuntu 10.10
2. the executable bit must be set before the context menu offers 'Open' and
executed the script.
3. once the script is set as executable, the script starts, but squeak does not
start (part of Pharo.sh) 
4. Pharo.sh works fine on ubuntu 9.04 - does not require the executable bit in
the script file.