feat: added get_singleton() functions to c/s-nodes

modules/you_done_it/client_node.cpp

@@ -50,6 +50,10 @@ void ClientNode::_notification(int what) {
 	}
 }
 
+ClientNode *ClientNode::get_singleton() {
+	return singleton_instance;
+}
+
 void ClientNode::connect_to_server(String const &server) {
 	ydi::client::connect(server);
 }

modules/you_done_it/client_node.h

@@ -15,6 +15,7 @@ protected:
 	void _notification(int what);
 
 public:
+	static ClientNode *get_singleton();
 	void connect_to_server(String const &url);
 
 private:

modules/you_done_it/server_node.cpp

@@ -62,3 +62,7 @@ void ServerNode::_notification(int what) {
 			return;
 	}
 }
+
+ServerNode *ServerNode::get_singleton() {
+	return singleton_instance;
+}

modules/you_done_it/server_node.h

@@ -13,6 +13,9 @@ class ServerNode : public Node {
 protected:
 	void _notification(int what);
 
+public:
+	static ServerNode *get_singleton();
+
 public:
 	static String const sig_clue_revealed;
 	static String const sig_connection_established;