Added mention of BOOST_DISABLE_ASSERT and range checking. Fixed a

reference to multi_array_ref.hpp, which is not a public interface to
multi_array (though it could be made one if so desired).


[SVN r32897]

libs/multi_array

@@ -1 +1 @@
-Subproject commit 3996cb45cbd470ef0db450eacf4d9aa41cd73ac1
+Subproject commit 9ddbd961ec4d135f1e6b89f6448e23ad0ef5c451