Update boost to 1.71 and add asio

boost/predef/library/std/sgi.h

@@ -0,0 +1,51 @@
+/*
+Copyright Rene Rivera 2008-2015
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE_1_0.txt or copy at
+http://www.boost.org/LICENSE_1_0.txt)
+*/
+
+#ifndef BOOST_PREDEF_LIBRARY_STD_SGI_H
+#define BOOST_PREDEF_LIBRARY_STD_SGI_H
+
+#include <boost/predef/library/std/_prefix.h>
+
+#include <boost/predef/version_number.h>
+#include <boost/predef/make.h>
+
+/*`
+[heading `BOOST_LIB_STD_SGI`]
+
+[@http://www.sgi.com/tech/stl/ SGI] Standard C++ library.
+If available version number as major, minor, and patch.
+
+[table
+    [[__predef_symbol__] [__predef_version__]]
+
+    [[`__STL_CONFIG_H`] [__predef_detection__]]
+
+    [[`__SGI_STL`] [V.R.P]]
+    ]
+ */
+
+#define BOOST_LIB_STD_SGI BOOST_VERSION_NUMBER_NOT_AVAILABLE
+
+#if defined(__STL_CONFIG_H)
+#   undef BOOST_LIB_STD_SGI
+#   if defined(__SGI_STL)
+#       define BOOST_LIB_STD_SGI BOOST_PREDEF_MAKE_0X_VRP(__SGI_STL)
+#   else
+#       define BOOST_LIB_STD_SGI BOOST_VERSION_NUMBER_AVAILABLE
+#   endif
+#endif
+
+#if BOOST_LIB_STD_SGI
+#   define BOOST_LIB_STD_SGI_AVAILABLE
+#endif
+
+#define BOOST_LIB_STD_SGI_NAME "SGI"
+
+#endif
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_LIB_STD_SGI,BOOST_LIB_STD_SGI_NAME)