Add MPI library

[SVN r40808]

libs/libraries.htm

@@ -169,6 +169,7 @@ how to download, build, and install the libraries.</p>
     <li><a href="algorithm/minmax/index.html">minmax</a> - standard library
         extensions for simultaneous min/max and min/max element computations,
     from Herv&eacute; Br&ouml;nnimann.</li>
+    <li><a href="../doc/html/mpi.html">MPI</a> - Message Passing Interface library, for use in distributed-memory parallel application programming, from Douglas Gregor and Matthias Troyer.</li>
     <li><a href="mpl/doc/index.html">mpl</a> - Template metaprogramming
     framework of compile-time algorithms, sequences and metafunction classes,
     from Aleksey Gurtovoy.</li>
@@ -465,6 +466,7 @@ how to download, build, and install the libraries.</p>
 <ul>
     <li><a href="interprocess/index.html">interprocess </a>- Shared memory, memory mapped files,
     process-shared mutexes, condition variables, containers and allocators, from Ion Gazta&ntilde;aga</li>
+    <li><a href="../doc/html/mpi.html">MPI</a> - Message Passing Interface library, for use in distributed-memory parallel application programming, from Douglas Gregor and Matthias Troyer.</li>
     <li><a href="thread/doc/index.html">thread</a> - Portable C++
       multi-threading, from William Kempf.</li>
 </ul>