Dusty: Whiskers and Range Sensors

Pull downs installed and working for the the whisker sensors and ultrasonic range finder installed and working. I'll be adding transistors to trigger two of the buttons on Dusty's control panel for lights, propeller and sound effects.

While everything installed so far is working in a test sketch, Dusty has no brains yet. I'll need to write some code so that Dusty can react to the environment. Then there is the mechanical aspect of fitting this all inside and setting up the whisker sensors.