- replaced osl_trace with sal_info
 - added new log areas to log-area.dox

Change-Id: Ib47c4b4c9604bca1f8a635dd01bb89702b47b591
Reviewed-on: https://gerrit.libreoffice.org/2010Reviewed-by: Thorsten Behrens <tbehrens@suse.com>
Tested-by: Thorsten Behrens <tbehrens@suse.com>