Add catch for (?) key help in joystick examples
Add catch for (?) key help in joystick examples

davetcoleman/sdk-examples,baxter-flowers/baxter_tools,jaspell/baxter_examples,davetcoleman/sdk-examples,umassrobotics/baxter,Sannoso/baxter_examples,RethinkRobotics/baxter,RethinkRobotics/baxter_tools,umassrobotics/baxter,wjchen84/baxter_examples,RethinkRobotics/baxter_examples