finished conforming renderers to new node structure

Stateless node system is done! Functionality is about equal to the functionality
in master meaning this is ready for merging.

app/render/backend/renderbackend.cpp

@@ -207,6 +207,8 @@ void RenderBackend::CacheNext()
 
   TimeRange cache_frame = cache_queue_.takeFirst();
 
+  //qDebug() << "Caching" << cache_frame.in();
+
   caching_ = GenerateData(cache_frame);
 }