Fetch complete JSON data block, use legend to extract images.
Unquote urlencoded strings.
Add image description as 'content'.
Add 'img_format' and 'source' data (needs PR #1567 to enable this data to be displayed).
Show images which lack ownerid instead of discarding them.
use data from embedded JSON to improve results (e.g. real page title), add image format and source info (see PR #1567), improve paging logic (it now works)