All the raw data requried by IPAC-33

We're using stories with images if we can find them, preferring new stories

Sample commentisfree json files for tests were created with:

uk/commentisfree?show-elements=image&tag=type/article&page-size=13

Also chose the best-sized image rather than the first one (which in some cases
was 54x54)

DRY with the story box, addws weburl for story