Boost.Range merge from trunk to release.

This is motivated by the need to correct the istream_range, to correct the adaptors.hpp header file, and correct the return types of various range algorithms.

[SVN r61517]

doc/html/index.html

@@ -3,7 +3,7 @@
 <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
 <title>Chapter&#160;1.&#160;Range 2.0</title>
 <link rel="stylesheet" href="../../../../doc/html/boostbook.css" type="text/css">
-<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.1">
 <link rel="home" href="index.html" title="Chapter&#160;1.&#160;Range 2.0">
 <link rel="next" href="range/introduction.html" title="Introduction">
 </head>
@@ -30,7 +30,7 @@
 </h3></div></div>
 <div><p class="copyright">Copyright &#169; 2003 -2010 Thorsten Ottosen, Neil Groves</p></div>
 <div><div class="legalnotice" title="Legal Notice">
-<a name="id621301"></a><p>
+<a name="id3005003"></a><p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
@@ -135,7 +135,7 @@
   </p>
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><p><small>Last revised: April 05, 2010 at 17:25:33 GMT</small></p></td>
+<td align="left"><p><small>Last revised: April 11, 2010 at 21:49:16 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>