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/math_test.cc b/motors/math_test.cc
index 1c7708e..06f168f 100644
--- a/motors/math_test.cc
+++ b/motors/math_test.cc
@@ -4,7 +4,7 @@
 #include "gmock/gmock.h"
 
 namespace frc971 {
-namespace salsa {
+namespace motors {
 namespace testing {
 
 class SinCosIntTest : public ::testing::Test {
@@ -76,5 +76,5 @@
 }
 
 }  // namespace testing
-}  // namespace salsa
+}  // namespace motors
 }  // namespace frc971