Unofficial Desmume with internal resolution increase option

[Squall Leonhart]

Please do not request this to be added on the official desmume tracker, it will be closed and you might find yourself belittled (depending on zeromus's mood).

He has plans to implement something similar after cleaning up the gpu code in his own time, and as the code for this hack is uncommented (and not very tidy) he will not be adding it.