Add http:// to demo output address
Add http:// to demo output address

This makes it easy to launch the demo in a browser by right clicking the URL in
gnome-terminal
akalipetis/xterm.js,xtermjs/xterm.js,cjordog/NRLWebsite,akalipetis/xterm.js,sourcelair/xterm.js,sourcelair/xterm.js,xtermjs/xterm.js,xtermjs/xterm.js,akalipetis/xterm.js,sourcelair/xterm.js,Tyriar/xterm.js,sourcelair/xterm.js,Tyriar/xterm.js,Tyriar/xterm.js,Tyriar/xterm.js,cjordog/NRLWebsite,xtermjs/xterm.js,Tyriar/xterm.js,xtermjs/xterm.js,akalipetis/xterm.js,cjordog/NRLWebsite,cjordog/NRLWebsite