Improvements

• sop/CSS2DObject and sop/CSS3DObject generate the respective CSS2DObject and CSS3DObject differently. It previously was generated from the node itself, and could not be altered in downstream nodes. From this version, it uses attributes to define the html id, class and content. And those attributes are only looked up at when the object is added to the scene graph.

Bug Fix

• js/setParam would fail if the linked parameter was not found when the js code was generated. This is now fixed.