Update README.md to reflect new github pages domain
Code Indentation and Formatting improvements
Flatten the image before starting the cutting (= huge speed improvement for layered PSDs!)
Provide an option to set whether we want to save transparent tiles or not
Since we've flattened the image we don't need to get all visible layers, but just check if the activeLayer is empty or not
Set the active layer to a background layer right before saving so that the defined bgColor is used as background color for the tiles
Add a UI Dialog (fixes #2, thanks @nspringer for kickstarting this)
Merge branch 'master' into gh-pages