for cropping images (and thumbnails)
www.domain.com/dir/file.jpg/imgcrop -- crop an image
www.domain.com/dir/file.jpg/imgcrop/thumb -- crop an image's thumbnail
www.domain.com/dir/file.jpg/imgcrop/newthumb -- crop and create a new thumbnail (from an original image)
www.domain.com/dir/imgcrop -- show images' list with above options
added: to Image class: some methods for cropping
git-svn-id: svn://ttmath.org/publicrep/winix/trunk@919 e52654a7-88a9-db11-a3e9-0013d4bc506e