Rename tuple_for_each.hpp to tuple.hpp

test/tuple_for_each_cx.cpp

@@ -6,7 +6,7 @@
 // See accompanying file LICENSE_1_0.txt or copy at
 // http://www.boost.org/LICENSE_1_0.txt
 
-#include <boost/mp11/tuple_for_each.hpp>
+#include <boost/mp11/tuple.hpp>
 #include <boost/config.hpp>
 
 // Technically std::tuple isn't constexpr enabled in C++11, but it works with libstdc++