Nest all namespaces

The compiler supports this now.  We can type less going forward.
No functional changes.

Signed-off-by: Stephan Pleines <pleines.stephan@gmail.com>
Change-Id: I29d6fa4f9aacc0e381f1a7637294db0392466995
diff --git a/y2014/wpilib_interface.cc b/y2014/wpilib_interface.cc
index b27e381..016b17a 100644
--- a/y2014/wpilib_interface.cc
+++ b/y2014/wpilib_interface.cc
@@ -55,8 +55,7 @@
 namespace shooter = ::y2014::control_loops::shooter;
 using std::make_unique;
 
-namespace y2014 {
-namespace wpilib {
+namespace y2014::wpilib {
 
 // TODO(Brian): Fix the interpretation of the result of GetRaw here and in the
 // DMA stuff and then removing the * 2.0 in *_translate.
@@ -769,7 +768,6 @@
   }
 };
 
-}  // namespace wpilib
-}  // namespace y2014
+}  // namespace y2014::wpilib
 
 AOS_ROBOT_CLASS(::y2014::wpilib::WPILibRobot);