Update installatron-install

Fixed URL for setup script.

 wget http://data1.liquenox.com/installatron/installatron_setup.sh
--2014-03-22 17:01:46--  http://data1.liquenox.com/installatron/installatron_setup.sh
Resolving data1.liquenox.com... 85.17.122.150
Connecting to data1.liquenox.com|85.17.122.150|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2014-03-22 17:01:46 ERROR 404: Not Found.