* jsonify inventory
* smarter import, dont pass kwargs where not needed
* added datetime
* Eventual plan for json utilities to migrate to common/json_utils when we split
basic.py no need to move jsonify to another file now as we'll do that later.
* json_dict_bytes_to_unicode and json_dict_unicode_to_bytes will also
change names and move to common/text.py at that time (not to json).
Their purpose is to recursively change the elements of a container
(dict, list, set, tuple) into text or bytes, not to json encode or
decode (they could be a generic precursor to that but are not limited
to that.)
* Reimplement the private _SetEncoder which changes sets and datetimes
into objects that are json serializable into a private function
instead. Functions are more flexible, less overhead, and simpler than
an object.
* Remove code that handled simplejson-1.5.x and earlier. Raise an error
if that's the case instead.
* We require python-2.6 or better which has the json module builtin to
the stdlib. So this is only an issue if the stdlib json has been
overridden by a third party module and the simplejson on the system
is 1.5.x or less. (1.5 was released on 2007-01-18)
