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.cc b/motors/big/motor_controls.cc
index 6a625bf..82dcc0b 100644
--- a/motors/big/motor_controls.cc
+++ b/motors/big/motor_controls.cc
@@ -3,7 +3,7 @@
 #include "motors/peripheral/configuration.h"
 
 namespace frc971 {
-namespace salsa {
+namespace motors {
 namespace {
 
 template <int kRows, int kCols>
@@ -239,5 +239,5 @@
   return debug_[theta];
 }
 
-}  // namespace salsa
+}  // namespace motors
 }  // namespace frc971