* Documentation/index.texi: Add, fix, change some links and names,

* Documentation/index.texi: Add, fix, change some links and names,
including dump of wiki wiki.

* Documentation/GNUmakefile (local-WWW): Slurp wiki.

* buildscripts/wiki-slurp.py: New file.  Accept multiple pattern.
(unwiki): Replace local urls with <img src> too.

* Documentation/GNUmakefile (wiki-dump): New target.

* Documentation/header.html.in: Link to Documentation/index
renamed to Index (was other...).

* make/lysdoc-targets.make (local-WWW): Add default targets .ps.gz
and .pdf.