adds test for inclusion of concept header

[SVN r40521]

test/iterator_pair.cpp

@@ -15,6 +15,7 @@
 #  pragma warn -8057 // unused argument argc/argv in Boost.Test
 #endif
 
+#include <boost/range/concepts.hpp>
 #include <boost/range/functions.hpp>
 #include <boost/range/metafunctions.hpp>
 #include <boost/static_assert.hpp>

test/mfc.cpp

@@ -1,5 +1,3 @@
-
-
 // Boost.Range MFC Extension
 //
 // Copyright Shunsuke Sogame 2005-2006.