fixup! Add debug tool to follow_wall_angle.

Author: zbynekwinkler

subt/main.py

@@ -146,6 +146,7 @@ class SubTChallenge:
     def __init__(self, config, bus):
         self.bus = bus
         bus.register("desired_speed", "pose2d", "artf_xyz", "pose3d", "stdout", "request_origin")
+        self.verbose = False
         self.start_pose = None
         self.traveled_dist = 0.0
         self.time = None