Bulk thumbnails function
Changed bulk thumbnails to specify needing a QuerySet
Added an AttributeError for incorrect field name
Added a docstring for get_thumbnails_from_queryset
get_thumbnails_from_queryset will return ThumbnailFile instances instead of just the url
Added a template filter for unpacking thumbnail dicts
Docstring for thumbnail_url_by_key()
Made it slightly more obvious that exceptions are coming from easy-thumbnails
Exception wording change
Pass through get_thumbnail() and get_thumbnailer()'s options
Remove extraneous try/except
Moved get_thumbnails_from_queryset()
Pass through 'save' and 'generate' get_thumbnail() options