Comment 2 for bug 1289465

The actual icons are suboptimal because they were designed for the torch feature, but we have already an icon called display-brightness-symbolic that was supposed to be used in the system settings menu to access to the brightness settings (I don't know if this still exists).

So, I added two icons to the theme:
* display-brightness-max which is a symbolic link of display-brightness-symbolic
* display-brightness-min is the same in half transparency

See http://bazaar.launchpad.net/~tiheum/ubuntu-themes/suru-icons/revision/372