Fixed plumbing for intake pistons.

Change-Id: Iac76cd83279f2a6ee6ac7367c3fd3972333d0865
diff --git a/bot3/control_loops/intake/intake.q b/bot3/control_loops/intake/intake.q
index c09bf87..70934b2 100644
--- a/bot3/control_loops/intake/intake.q
+++ b/bot3/control_loops/intake/intake.q
@@ -6,7 +6,7 @@
   implements aos.control_loops.ControlLoop;
 
   message Goal {
-    // Positive = suck, negative = spit, zero = stationary.
+    // Units: volts
     double movement;
 
     bool claw_closed;