1.17.2: (unstable)

* Actor:
  - Correct the get_children() return type.
  (Ian Martin) Bug #728206.
  - Add several properties.
  (Murray Cumming)
* BoxLayout: Add orientation property.
  (Murray Cumming)
* DeformEffect: Add get_back_material().
  (Murray Cumming)
* LayoutManager: Add get_child_meta() and layout_changed().
  (Murray Cumming)
* Media: Use std::string for filenames.
  (Murray Cumming)
* Script:
  - Add load_from_resource(), get_object(),
  and set/get_translation_domain().
  (Murray Cumming)
  - Use std::string for filenames.
  (Murray Cumming)
* Stage: Rename get/set_motion_events() to get/set_motion_events_enabled().
  (Murray Cumming) 
* examples/test-actors: Use CLUTTER_KEY_q instead of CLUTTER_q.
  (Murray Cumming)