Smart Pointers Library entry added.

[SVN r33394]

index.htm

@@ -449,6 +449,28 @@
                             </ul>
                           </li>
 
+                          <li>
+                            <span class="library"><a href=
+                            "libs/smart_ptr/smart_ptr.htm">Smart
+                            Pointers Library</a>:</span>
+
+                            <ul>
+                              <li><a href=
+                              "libs/smart_ptr/shared_ptr.htm#allocator_constructor">
+                              Allocator support</a> as proposed in <a href=
+                              "http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1851.pdf">
+                              N1851</a> (162 Kb PDF).</li>
+
+                              <li><a href=
+                              "libs/smart_ptr/pointer_cast.html">
+                              <code>pointer_cast</code></a> and <a href=
+                              "libs/smart_ptr/pointer_to_other.html">
+                              <code>pointer_to_other</code></a> utilities to
+                              allow pointer-independent code, from Ion
+                              Gaztanaga.</li>
+                            </ul>
+                          </li>
+
                           <li>
                             <span class="library"><a href=
                             "libs/wave/doc/index.html">Wave