Add a new library, editlib, for parsing diffs. It will parse the diff html page, extracting info like editor, time, edit summary, etc, and creating lists of the lines and words marked as added and deleted. More details can be found in the docstrings. For use with editlib, some new functions are also added to userlib. These will get the user's registration date, the number of edits the user has made, and the number of vandalism warnings on the user's talk page. Only Wikipedia:en is supported - some of the regular expressions rely on English text. Within that scope, I've done reasonably thorough testing on the editlib functions, and somewhat less thorough testing on the new functions for userlib. All of this is designed for use with automated vandalism detection. I am working on a bot to do just that - User:Kalbot - but it's still in an early experimental stage. I am User:DKalkin on the English Wikipedia