message: Added GUI direction
diff: @@ -21,3 +21,19 @@ in <b>MulticopterSim/Extras/python</b> for installing the <b>multicopter_sim</b>
  and choosing a vehicle.
  6. In <b>MulticopterSim/Extras/nengo</b> folder, run <tt>python3 takeoff.py</tt>, and click the play button.
  +
  +To control the simulator from the Nengo GUI, you will need to clone and install the
  +[hooks](https://github.com/nengo/nengo-gui/tree/hooks)
  +branch of NengoGUI:
  +
  +```
  +%git clone -b hooks https://github.com/nengo/nengo-gui
  +cd nengo-gui
  +python3 setup.py install
  +```
  +
  +(On Linux you may need to issue that last command with <tt>sudo</tt>.)
  +
  +Then in <b>MulticopterSim/Extras/nengo</b> folder, run <tt>nengo gui_takeoff.py</tt>, click the play button in the
  +Nengo GUI, and then the play button in UE4 Editor.
  +
  