Content of *htmldoc/* : 
-----------------------

Will be the place where a one-file version of the OWLDoc will be generated.

To generate it :

 1. generate the book.book file :
  $ cd htmldoc/
  $ python ../owldoc2htmldoc.py book ../helios_bt/ontologies/index.html helios_bt >book.book

 2. document things in the about.html

 2. process the book.book file :
  $ htmldoc --batch book.book

 3. convert the contents of the generated book.html file to have only internal links :
  $ python ../owldoc2htmldoc.py convert ../helios_bt/ontologies/index.html helios_bt book.html >index.html


Maybe : 
 - add a new stylesheet
<link rel='stylesheet' href='default.css' type='text/css' />