Updates osgAnimation

This updates is mainly for the gles plugint to work correctly.

* adds Quaternion array
* reintroduces `KeyframeContainer::linearInterpolationDeduplicate`
* fixes MorphGeometry OSG serialization (target names)

src/osgAnimation/RigGeometry.cpp

@@ -24,7 +24,7 @@ osg::BoundingBox RigComputeBoundingBoxCallback::computeBound(const osg::Drawable
 {
     const osgAnimation::RigGeometry& rig = dynamic_cast<const osgAnimation::RigGeometry&>(drawable);
 
-    // if a valid inital bounding box is set we use it without asking more
+    // if a valid initial bounding box is set we use it without asking more
     if (rig.getInitialBound().valid())
         return rig.getInitialBound();
 

src/osgWrappers/serializers/osgAnimation/UpdateMorph.cpp

@@ -11,6 +11,7 @@ REGISTER_OBJECT_WRAPPER( osgAnimation_UpdateMorph,
                          osgAnimation::UpdateMorph,
                          "osg::Object osg::Callback osg::NodeCallback osgAnimation::UpdateMorph" )
 {
+    ADD_VECTOR_SERIALIZER( TargetNames, osgAnimation::UpdateMorph::TargetNames, osgDB::BaseSerializer::RW_STRING, 1 );
 }
 
 #undef OBJECT_CAST