Compatible to nvidia-experimental-304

More thoughtful install script in chroot. Not only copy content
of data.tar.gz to / but also modify postinst in control.tar.gz
and run afterwads
Exact driver name matching. Enclose ifs in quotes

Be careful not to grab nvidia-current-settings when looking
for nvidia-current. Therefore the driver's name must be enclosed
in whitespaces
Fix typ, forgot closing semicolon
Save modified postinst to postinst2

Otherwise we get an name collision and postinst results
to be an empty file
Merge branch 'master' of github.com:SimonEbner/jenkins_setup
Test whehter :0 can be opened at the beginning
Skip Xauthority
Merge branch 'master' of github.com:fmw-jk/jenkins_setup
Merge branch 'master' of github.com:SimonEbner/jenkins_setup
Skip Xauthority
Merge branch 'master' of github.com:SimonEbner/jenkins_setup
Make checkDisplayNull executable
Merge branch 'master' of github.com:SimonEbner/jenkins_setup