CORS begone

This intermediate release introduces the most important fix - complete removal of dependence on CORS-bypassing proxies of any kind. The page code is now injected by wrapping it into a js script file which can be loaded without CORS limitations. This eliminates the instability that plagued the uploader since its creation.

New features include logging only errors to keep the log clean when uploading large amount of pictures as well as producing a batch command file to sort images that caused errors into separate folders by error type. This will help localizing and fixing mistakes when mass-uploading. Scripts should work both on Windows and Unix (although the latter is untested).