MD5 fix for issue #546 

Tested with a few queries, should be okay, lmk if i missed something.
> it won't give you the md5 of "hash" if you just type `md5 hash`

Honestly, I'm not so sure that's such a bad thing.  I'm not sure it makes sense to think the intent there is to get an MD5 of the string "hash".  I don't think it's a huge deal either way, especially since it is probably good for serendipitous discovery of the Goodie.