Add the changes to the hash library to the index page.

[SVN r32974]

index.htm

@@ -221,6 +221,23 @@
                           _2)</code> requires no heap allocation when
                           placed into a Boost.Function object.</li>
                             
+                          <li><span class="library">
+                          <a href="libs/functional/hash/index.html">
+                              Functional/Hash Library</a></span>
+                          <ul>
+                            <li>Use declarations for standard classes, so that
+                            the library doesn't need to include all of their
+                            headers</li>
+                            <li>Deprecated the
+                            <tt>&lt;boost/functional/hash/*.hpp&gt;</tt>
+                            headers.</li>
+                            <li>Add support for the
+                            <tt>BOOST_HASH_NO_EXTENSIONS</tt> macro, which
+                            disables the extensions to TR1</li>
+                            <li>Minor improvements to the hash functions
+                            for floating point numbers.</li>
+                          </ul></li>
+
                            <li><span class="library"><a
                            href="libs/graph/doc/index.html">Graph
                            Library</a>:</span>