GUI scaling patch (200% and beyond)

This mod adds support for 4K displays. 

- Adds 200% and more scaling support (2x of Normal)

- Extends scaling range

Forum theme: 

http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/2719401-highter-gui-scaling-minecraft-patch

Github: 

https://github.com/acterhd/minecraft-highdpi