Update README.md

Author: pythoneer

README.md

@@ -7,6 +7,8 @@ This program is published under the terms of the LGPL (http://www.gnu.org/licens
 ####How to use
 For a detailed example see main.cpp
 ```cpp
+  XInputSimulator &sim = XInputSimulator::getInstance();
+
   sim.mouseMoveTo(500,400);         //set mouse to screen cords 500x400
   sim.mouseMoveRelative(400, -100); //move frome there 400px in x to the right and -100px in y upwards
   sim.mouseDown(1);                 //press left mouse and hold