Started to merge @ZobyTwo cmake branch

thirdparty/Boost/boost/preprocessor/facilities/empty.hpp

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+# /* Copyright (C) 2001
+#  * Housemarque Oy
+#  * http://www.housemarque.com
+#  *
+#  * 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)
+#  */
+#
+# /* Revised by Paul Mensonides (2002) */
+#
+# /* See http://www.boost.org for most recent version. */
+#
+# ifndef BOOST_PREPROCESSOR_FACILITIES_EMPTY_HPP
+# define BOOST_PREPROCESSOR_FACILITIES_EMPTY_HPP
+#
+# /* BOOST_PP_EMPTY */
+#
+# define BOOST_PP_EMPTY()
+#
+# endif