 type safety.
          </li>
<li class="listitem">
            Changed typedefs and reordered functions of sequence containers to improve
            doxygen documentation.
          </li>
<li class="listitem">
            Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/6615" target="_top">#6615</a>,
            <a href="https://svn.boost.org/trac/boost/ticket/7139" target="_top">#7139</a>,
            <a href="https://svn.boost.org/trac/boost/ticket/7215" target="_top">#7215</a>,
            <