Now with slugs!

I've just integrated my new AppEngine Datastore mixin class, sluggable-mixin.  It adds the ability to associate a user-friendly slug with any datastore entity.  Posts here are now referenced by slug rather than their lengthy and meaningless datastore ID string.

I'm going to release it as open source as soon as I can polish it up a bit and write some good documentation.  I'm a stickler for good, thorough documentation and automated unit tests.  The tests are done; although, they might not have as much coverage as I'd like.  I'm hoping to get sluggable-mixin released before the New Year begins.