
Fix Photo cache - allow multiple sizes.

Implement smart PhotoList backing cache - eliminate the 5000 photo limit.

Add the ability to flush cache on each class.

photosets

    * flickr.photosets.getContext

photos

    * flickr.photos.getContext
    * flickr.photos.getCounts
    * flickr.photos.getNotInSet
    * flickr.photos.getRecent
    * flickr.photos.getUntagged
    * flickr.photos.recentlyUpdated
    * flickr.photos.getContext

photos.upload

    * flickr.photos.upload.checkTickets

Photo upload (async)
Photo replace (async)

