Adds an "Edit scrobble" entry to the context menu of Last.fm
This script adds the ability to edit scrobbles on Last.fm, even if you don't have Last.fm PRO. It works as a combination of an authenticated Last.fm application to scrobble the corrected song – so you'll have to allow access to the Last.fm application (named "PlaylistLover") first – and JavaScript on the page to simulate a click on delete of the old song. This only works up to 14 days in the past.
