Object missing bindings

[migueldeicaza]

• [ ] object_get_child - find the child of an object by its koid
• [ ] object_get_cookie - read an object cookie
• [ ] object_get_property - read an object property
• [ ] object_set_cookie - write an object cookie
• [ ] object_set_property - modify an object property
• [ ] object_signal - set or clear the user signals on an object
• [ ] object_signal_peer - set or clear the user signals in the opposite end
• [ ] object_wait_many - wait for signals on multiple objects
• [ ] object_wait_one - wait for signals on one object
• [ ] object_wait_async - asynchronous notifications on signal change
• [ ] handle_close_many