Create an overview which gadgets and userscripts are used most often and check how well they maintained. This is the first part of the wish "Identify high-use gadgets and ensure that they have proper long-term maintenance" from the 2016 Community Wishlist Survey.

1. part: grab the statistics for gadget-usage & clean them from artifacts
2. part: Download all common.js pages and search for the most common lines (imports).
3. part: Gather background info (how maintains the code) and present the results nicely on a Wikipage.