add signal/slot

src/client/Client.h

@@ -31,6 +31,8 @@ private:
 	void accelerate(double x, double y, double z);
 	void drop_bomb(double rx, double ry, double rz, double ttl);
 	void loadConsoleFont();
+
+	void onExplosion(double x, double y, double z);
 };
 
 #endif /* CLIENT_H_ */