Drag and Drop added!

I now have drag and drop support for images. It is pretty powerful - you can import any image type PIL supports (including png, jpeg, gif, pbm, pgm, ppm, tiff, targa, rast, xbm, and bmp among others). This should help speed up the workflow. Note that is converts all images to png internally to maintain compatibility with swfc - this may use up extra space if you are importing many images.