Procrastination, that's what you need

As expected, I'm putting off delving into the delta frames format. As you might expect, it's pretty complicated, so I've been trying to make sure my program is ready for it. I've now got a proper image struct for storing the images, which makes it much easier to have a second one to store the new image. Part of me feels I should be doing this properly in C++ classes though... I'll have to eventually...