Hygiene: Add JSONP support to API classes

This makes it easier for an API to use JSONP mode

Change-Id: I5a0af287712b75343ca587bb399a4fa61642fe03
Hygiene: Abstract more of the nastiness of the wikidata api

Return a simple object with information about the wikidata item.

Change-Id: Ib680afae6e3b864057230619eb9c9e4f30e0b5ea
Merge "Hygiene: Add JSONP support to API classes"
Merge "Hygiene: Abstract more of the nastiness of the wikidata api"