   <li>Identify changes in pre-processed source file, the pre-processor
    options and keys correctly in incremental builds.</li>

    <li>Improve speed of pre-processing in incremental builds by not performing
    any unnecessary null-action pre-processing.</li>

    <li>Load archiver no longer includes main program objects.</li>

    <li>It is now possible for a sub-package to exclude particular types of
    dependencies.</li>
  </ul>

  <p>Extract system:</p>

  <ul>
    <li>Sub-directories are now extr