Extension:WikiGrok

This extension handles all the back-end functionality needed by the WikiGrok feature in MobileFrontend. It is currently used for three discrete functions:
 * Generating Wikidata claim suggestions for Wikipedia pages (WikiGrok campaigns)
 * Recording responses from the WikiGrok interface (via wikigrokrespose API module)
 * Providing an API for retrieving random Wikipedia pages that have claim suggestions (via wikigrokrandom query generator)