Added control loops for all subsystems and made tests run.

Change-Id: I66542db4355a89f6d24c1ad4772004182197c863
diff --git a/frc971/control_loops/fridge/fridge.h b/frc971/control_loops/fridge/fridge.h
index c73a85c..3d0fa6c 100644
--- a/frc971/control_loops/fridge/fridge.h
+++ b/frc971/control_loops/fridge/fridge.h
@@ -36,10 +36,8 @@
 
  private:
   // The state feedback control loop or loops to talk to.
-  ::std::unique_ptr<StateFeedbackLoop<2, 1, 1>> left_arm_loop_;
-  ::std::unique_ptr<StateFeedbackLoop<2, 1, 1>> right_arm_loop_;
-  ::std::unique_ptr<StateFeedbackLoop<2, 1, 1>> left_elev_loop_;
-  ::std::unique_ptr<StateFeedbackLoop<2, 1, 1>> right_elev_loop_;
+  ::std::unique_ptr<StateFeedbackLoop<4, 2, 2>> arm_loop_;
+  ::std::unique_ptr<StateFeedbackLoop<4, 2, 2>> elev_loop_;
 };
 
 }  // namespace control_loops