Moved 2014 drivetrain code into y2014 namespace.

Change-Id: I74a1922f846a288725df2aea01c5c9e1b99e07b3
diff --git a/y2014/control_loops/drivetrain/drivetrain_main.cc b/y2014/control_loops/drivetrain/drivetrain_main.cc
index 9a2ebe1..cc71c69 100644
--- a/y2014/control_loops/drivetrain/drivetrain_main.cc
+++ b/y2014/control_loops/drivetrain/drivetrain_main.cc
@@ -4,7 +4,7 @@
 
 int main() {
   ::aos::Init();
-  frc971::control_loops::DrivetrainLoop drivetrain;
+  ::y2014::control_loops::drivetrain::DrivetrainLoop drivetrain;
   drivetrain.Run();
   ::aos::Cleanup();
   return 0;