Activated multipass rendering: The traverse function executing the draw action...

Activated multipass rendering: The traverse function executing the draw action of the scene graph will now be called multiple times in order to render in multiple passes. The number of rendering passes will be determined by a mutlipass information action that is called before the drawing action.

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@7801 383ad7c9-94d9-4d36-a494-682f7c89f535