Added drag and drop.

Signed-off-by: Dan Printzell <xwildn00bx@gmail.com>
Fixed drag and drop on windows.

Signed-off-by: Dan Printzell <xwildn00bx@gmail.com>
added map splitting function, almost completed world rendering and added save in increments
test
merge
fixed linux cpp-flag, labels to splitting image GUI and clean buffer list option
Fixed bug with unequal width and height when splitting with dither