Debianism

This adds a install script that will allow you to install globaleaks on a debian based system.

It is basically what used to be inside of the package, instead it is done in a separate script. 

This will allow easier acceptance from the debian elders.

![Elders of the internet](http://24.media.tumblr.com/tumblr_lmk2wwLRon1qkd5jxo1_500.gif)