Implement thumbnail badges (fixes #191)
assign thumbnail badges with the badges popup, alpha
Fix: apply badges popup shows wrong default seletion
Fix: the apply badges popup removes applied category badges
Fix: badge tile displays None for invisible badges
thumbnailbadges: resize thumbnail, allow arbitary mimetype
pep8
s/getthumbnail/get_thumbnail
Fix: badge thumbnail image is not resized
allow to remove all assigned thumbnail badges
Fix: dont show facet thumbnail badge if badge is invisible
dont show empty thumbnail badge facets
allow memoize decorator with custom make_key function
cache badge thumbnail generator
pep8
optimize badge thumbnail image
Fix: cannot change the badge thumbnail image (cache invalidation not working right)
added FileUpload and ImageFileUpload Validator
pep8
set default ValidImageFileUpload max size to 5MB