Simulation hen: Airplug-ns

For running the Airplug-ns mode, you need to install the simulation hen. It is composed of some add-ons for the Network Simulator ns-2 (the installation of ns-2 is required). This mode allows to run the chicken (that is, the applications) into the simulators with few modifications. We use it for studying the scalability of our protocols and for comparisons with others.