Merge pull request #159 from udacity/updating-dbw-comments

Minor comment changes

Author: mvirgo

ros/src/twist_controller/dbw_node.py

@@ -53,8 +53,8 @@ def __init__(self):
         self.brake_pub = rospy.Publisher('/vehicle/brake_cmd',
                                          BrakeCmd, queue_size=1)
 
-        # TODO: Create `TwistController` object
-        # self.controller = TwistController(<Arguments you wish to provide>)
+        # TODO: Create `Controller` object
+        # self.controller = Controller(<Arguments you wish to provide>)
 
         # TODO: Subscribe to all the topics you need to