Hotfix Demo 0.4.0.2

I've just updated the demo with a small patch addressing some small issues I found when players were playing: [list] [*] Added proper control icons/names where appropriate when playing with controllers. [*] Enhanced the auto aim slightly, to auto update when getting too far away from a target. [*] Made an option for dropping runes with Y when playing with controllers. [*] Made an option to auto-equip runes with X when playing with controllers. [*] Adjusted the difficulty a little bit down on the first difficulty. [*] Added appropriate error messages when players try to do actions they can't [/list]