fix boost 1_56 serialization problem, https://chaste.cs.ox.ac.uk/trac/ticket/2585#comment:5

gtsam/linear/NoiseModel.h

@@ -19,6 +19,8 @@
 #pragma once
 
 #include <boost/serialization/nvp.hpp>
+#include <boost/serialization/extended_type_info.hpp>
+#include <boost/serialization/singleton.hpp>
 #include <boost/serialization/shared_ptr.hpp>
 #include <boost/serialization/optional.hpp>
 #include <gtsam/base/Matrix.h>
@@ -729,7 +731,7 @@ namespace gtsam {
       };
 
       /// Cauchy implements the "Cauchy" robust error model (Lee2013IROS).  Contributed by:
-      ///   Dipl.-Inform. Jan Oberl<EFBFBD>nder (M.Sc.), FZI Research Center for
+      ///   Dipl.-Inform. Jan Oberlaender (M.Sc.), FZI Research Center for
       ///   Information Technology, Karlsruhe, Germany.
       ///   oberlaender@fzi.de
       /// Thanks Jan!