k for self-assignment
          (Gary Powel); made converting functions explicit (Gary Powel); added overflow
          guards for division operators and abs (Peter Schmitteckert); added sup
          and l1; used Vesa Karvonen's CPP metaprograming technique to simplify code.
        </li>
<li class="listitem">
          1.5.0 - 23/03/2001: boostification, inlining of all operators except input,
          output and pow, fixed exception safety of some members (template version).
        </li>
<li class="lis