README updates: fixed generate example, added instructions on route overriding
README updates: fixed generate example, added instructions on route overriding

bentoncreation/high_voltage,bentoncreation/high_voltage,thoughtbot/high_voltage,webdev1001/high_voltage,zBMNForks/high_voltage,LimeBlast/high_voltage,thoughtbot/high_voltage,LimeBlast/high_voltage