Rigify: add utility and operator classes for the upcoming face rigs.

- LazyRef utility class that provides a hashable field reference.
- NodeMerger plugin for grouping abstract points by distance.
- pose.rigify_copy_single_parameter operator for copying a single
  property to all selected rigs that inherit from a specific class
  (intended to be used via property panel buttons).

1 files changed, 3 insertions, 0 deletions

diff --git a/rigify/__init__.py b/rigify/__init__.py
index e91fca51..1bb633f6 100644
--- a/rigify/__init__.py
+++ b/rigify/__init__.py
@@ -64,6 +64,7 @@ initial_load_order = [
     'rig_ui_template',
     'generate',
     'rot_mode',
+    'operators',
     'ui',
 ]
 
@@ -449,6 +450,7 @@ def register():
     ui.register()
     feature_set_list.register()
     metarig_menu.register()
+    operators.register()
 
     # Classes.
     for cls in classes:
@@ -597,6 +599,7 @@ def unregister():
     clear_rigify_parameters()
 
     # Sub-modules.
+    operators.unregister()
     metarig_menu.unregister()
     ui.unregister()
     feature_set_list.unregister()