* Generate diffs old-to-new instead of new-to-old. I think this will be easier to...

* Generate diffs old-to-new instead of new-to-old.  I think this will be easier to work with because we can just append.  Maybe I'll change my mind again.  Right now it's just writing them to the log.  In a little while I'll start writing them to disk and we'll see how it goes.