started memory cache server

nodes/node.cpp

@@ -38,16 +38,16 @@ int Node::ParameterCount()
   return parameters_.size();
 }
 
+void Node::Process(rational time)
+{
+  Q_UNUSED(time)
+}
+
 NodeGraph *Node::ParentGraph()
 {
   return static_cast<NodeGraph*>(parent());
 }
 
-double Node::Time()
-{
-  return ParentGraph()->Time();
-}
-
 const QPointF &Node::pos()
 {
   return pos_;