F pedal mock toggle (#55)

* Adding toggle method to pedal mock

* Copyright fix

* Making pedal mock gracefully fail in non-x-server environments (e.g. CI)

* Flow improvments to pedal mock

* Lint fixes

* No, use the old linter, don't need two people fixing one repo...

* OK, never mind

Author: ethanfowler

sr_pedal/src/sr_pedal/sr_triple_pedal_mock.py

@@ -17,11 +17,14 @@
 # with this program. If not, see <http://www.gnu.org/licenses/>.
 
 from __future__ import absolute_import
-import rospy
+
 import sys
-from sr_pedal.msg import Status
 from threading import Lock, Thread
 
+import rospy
+
+from sr_pedal.msg import Status
+
 # If we're in a non-X-server (e.g. CI) environment, this import will fail
 try:
     from pynput import keyboard