Release webbase-5.12

*  An interface with the langrec library has been added to allow
   language recognition of the crawled documents. The --with-langrec
   configure flag includes the library. By default the library is not
   used. The iso code of the language is stored in the database record
   describing the URL.

*  The documentation has been enriched with many drawings depicting
   the internal architecture of the code.

*  The interface to the full text libaray mifluz has been upgraded to 
   mifluz-0.19

*  Manual pages for consistentc has been added and the man page of
   of crawler reviewed.

*  All known leaks have been fixed.

*  The installation scheme was redesigned to match the GNU/Linux standards

*  The configure script was reviewed and enhanced.

*  Some extensions (.tap, .rar ...) were added to the list of known mime 
   types.

*  A cache for hostnames lookup has been added to reduce the DNS traffic.

*  A usage option was added to the crawler program to replace the terse
   usage.

*  A -where_url option was added to control the scope of URLs given
   to the indexer when rebuilding the full text index (mifluz) from 
   scratch.

*  Filtering of URLs during the crawl can now be made using regular
   expressions.

