Pymong json_util documentation needs update concerning binaries

In the docs for json_util (http://api.mongodb.org/python/1.7/api/pymongo/json_util.html) it states "Currently this does not handle special encoding and decoding for Binary and Code instances." but json_util does indeed serialize and deserialize several binary types quite nicely.

For example, UUID objects get serialized into a something like this "

{ $UUID : myUUIDhexhere }

". It would be great if there was a reference for all serializable binary types along with their corresponding json_util output format.