Add to the hash tests, tests for the BOOST_HASH_NO_EXTENSIONS macro and a few other updates.

[SVN r32901]

test/link_no_ext_test.cpp

@@ -0,0 +1,17 @@
+
+//  (C) Copyright Daniel James 2005.
+//  Use, modification and distribution are subject to 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)
+
+#define HASH_NAMESPACE boost
+#define BOOST_HASH_NO_EXTENSIONS
+#include <boost/functional/hash.hpp>
+
+extern int f(std::size_t, int*);
+
+int main() {
+    HASH_NAMESPACE::hash<int*> ptr_hasher;
+    int x = 55;
+    return f(ptr_hasher(&x), &x);
+}