add template Node::clone() and remove destroy_immediate

src/node.h

@@ -195,16 +195,24 @@ public:
     virtual void parse_attributes(kAttribute ka, const tinyxml2::XMLAttribute* attr);
     void load_internal(const tinyxml2::XMLElement* x_node);
     virtual void draw();
-    Node* clone();
     virtual Node* clone_instantiate() const;
     virtual void clone_copy(Node* dest) const;
     virtual void clone_children(Node* dest) const;
     virtual void clone_finalize(Node* dest) const;;
     void watch(std::function<bool(Node*)> observer);
-    void destroy();
-    virtual void destroy_immediate();
+    virtual void destroy();
     Node* root();
 
+
+    template<class T = Node> std::shared_ptr<T> clone()
+    {
+        std::shared_ptr<T> n = std::shared_ptr<T>((T*)clone_instantiate());
+        clone_copy(n.get());
+        clone_children(n.get());
+        clone_finalize(n.get());
+        return n;
+    }
+
     template<class T = Node> T* find(const char* ids)
     {
         uint16_t id = const_hash(ids);