Day one patches!

Hello! I'm glad that so many of you like this tool. It's really neat. Anyways I've got some updates here.

1.  A GIF exporter! This probably should have come out on launch but it's here now. You can find this under the file tab. (In the executable directory you can find the individual frames under the "Img" folder as .png files)
2. An increased maximum resolution of backgrounds 512 -> 1920 for some HD goodness.
3. Some minor bugs I found.