Move all the motors stuff into a saner namespace

Letting the mechanical engineers name software is never a good idea...

Change-Id: I5d0e43d84a8f45693435472cc0e5e288f6190b14
diff --git a/motors/big/motor_controls.h b/motors/big/motor_controls.h
index 1f19e6d..b9514fd 100644
--- a/motors/big/motor_controls.h
+++ b/motors/big/motor_controls.h
@@ -10,7 +10,7 @@
 #include "Eigen/Dense"
 
 namespace frc971 {
-namespace salsa {
+namespace motors {
 
 class MotorControlsImplementation : public MotorControls {
  public:
@@ -56,7 +56,7 @@
   int16_t debug_[9];
 };
 
-}  // namespace salsa
+}  // namespace motors
 }  // namespace frc971
 
 #endif  // MOTORS_MOTOR_CONTROLS_H_