ControllerNode should be able to return the value of a button

[Dylan-Powers]

Right now we use the following to get controller input: m_controller->getController()->get_digital(m_button1); where m_controller is a ControllerNode object and m_button1 is a button object. What that code does is get the pros::Controller object from our ControllerNode and then call a PROS method on it. We should create our own method to wrap the PROS functionality.

• Create a public method in ControllerNode

• This method should return the current value of that button

• This method should have one parameter, a button object

• Test and verify that the method works with all buttons

• Change all current readings of controller values to use this method.