White balance fixes for latest images.
Added new sketches, fixed some ordering and indexing issues in the XML.  Also added source for Etsy listing photos.
Revamped back end for simplicity, performance.

Scaled images are now stored in memcached instead of on the filesystem.  XMLs are loaded once at startup instead of on each request.  Moved to a lighter method of determining image dimensions.

Added support for returning image dimensions as part of the meta data response.
Added justified image grid for the gallery front-end.  Instead of using jquery.justiflow, I'm now using a simpler and lighter Angular-based implementation.