Release Name: 0.6.3

Notes:
This is a bugfix release. See the changelog for details.


Changes:
* ContextualService is more restrictive about accepting methods starting with
  'get_' or 'set_'
* Fixed MapObject.get_class_fields
* Fixed bug with boolean query inference in Query.And or Query.Or
* Fixed a bug where the MockObjectStore was incorrectly handling a query with
  both a limit and an order_by
* MockObjectStore#get_all will automatically order results by pk_id