Pull in Mediawiki tasks.

Currently doesn't build but pulling in @apexkid changes.
Add missing import
Bug fixes, cleanup

This now works all the way through. Tests pass, edit to MediaWiki.org is confirmed. Closes #90.
Add edit summary

Mark as minor. Add a summary that is helpful to editors, with links. The edit should be marked as a bot but isn't for some reason, going to ignore that.