Claw now zeros!

- Debugged plant
- Switched to a simple controller architecture.
- Fixed controller.
diff --git a/frc971/constants.h b/frc971/constants.h
index 4a6949e..230ca1f 100755
--- a/frc971/constants.h
+++ b/frc971/constants.h
@@ -42,6 +42,7 @@
 
   double claw_zeroing_off_speed;
   double claw_zeroing_speed;
+  double claw_zeroing_separation;
 
   // claw seperation that would be considered a collision
   double claw_min_seperation;