Added URL-handler for (r)esizing/(c)ropping  linked user/album-picture.
Using Google-App Engine's Image-Library instead of PIL's... PIL had some error reading/interpreting some UTF-8 encoded JPEG/JFIF-Images.
Added zlib en-/decoding for values store in the cache.
Added base-application-file for handling resizing/cropping image-requests.
Added caching for generated pictures, actually requested link.