the library doesn't need
          to include all of their headers
        </li>
<li class="listitem">
          Deprecated the <code class="computeroutput"><span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">functional</span><span class="special">/</span><span class="identifier">hash</span><span class="comment">/*.hpp&gt;</span></code> headers. Now a single header,
          &lt;<code class="computeroutput">boost/functional/hash.hpp</