Log Message:
Import halibut-1.0 as textproc/halibut.

Halibut reads documentation source in a single input format, and produces
multiple output formats containing the same text.

The supported output formats are:

    * Plain ASCII text
    * HTML
    * PDF
    * PostScript
    * Unix man pages
    * Unix info, generated directly as .info files rather than .texi sources
    * Windows HTML Help (.CHM files), or rather source which can be fed to
      the MS HTML Help compiler to generate them
    * Windows WinHelp (old-style .HLP files), generated directly without
      needing a help compiler.