Chess Visualizer version 0.59, battery support

Version 0.59 is live now with battery support!

It has been some time since I updated the app last. Adding battery support turned out to be quite a big challenge but at last check, take, and forcing move arrows show now correctly in most positions where batteries are present.. There are still some issues with positions that involve the king, those will be ironed out soon.

I also added the option to separately enable/disable the check, take and forcing move arrows for the opponent with Shift-C/Shift-T/Shift-F.