* new metarig type for the durian dragon leg (original rig by Cessen)

* option to roll the delta of the arm rig.
* fix to copy metarig type
* renamed EditBone.align() --> EditBone.align_roll()
* Added EditBone.align_orientation(other)
* Added bone.vector: same as (bone.tail - bone.head)

release/scripts/modules/rigify_utils.py

@@ -353,6 +353,7 @@ def bone_class_instance(obj, slots, name="BoneContainer"):
     class_dict = { \
         "obj": obj, \
         "attr_names": attr_names, \
+        "attr_initialize": _bone_class_instance_attr_initialize, \
         "update": _bone_class_instance_update, \
         "rename": _bone_class_instance_rename, \
         "names": _bone_class_instance_names, \
@@ -380,6 +381,16 @@ def auto_class_instance(slots, name="ContainerClass", class_dict=None):
     return auto_class(slots, name, class_dict)()
 
 
+def _bone_class_instance_attr_initialize(self, attr_names, bone_names):
+    ''' Initializes attributes, both lists must be aligned
+    '''
+    for attr in self.attr_names:
+        i = attr_names.index(attr)
+        setattr(self, attr, bone_names[i])
+
+    self.update()
+
+
 def _bone_class_instance_update(self):
     ''' Re-Assigns bones from the blender data
     '''