How do I get add-apt-repository to work through a proxy?
http://askubuntu.com/questions/53146/how-do-i-get-add-apt-repository-to-work-through-a-proxy?rq=1
http://askubuntu.com/questions/53146/how-do-i-get-add-apt-repository-to-work-through-a-proxy?rq=1