Update analysis for Le Soir

archives.lesoir.be and www.lesoir.be seems now to use different software.

archives. still use the old markup, www. uses a new markup.

Logic is separated in two classes, LeSoirPage and ArchivesLeSoirPage

Common processing bits are in LeSoirPage:

• processDate to handle the date as a long dd mmmm yyyy
• processAuthors to handle specific and variable authors information

Removed trailing ?> from lesoir.php

Fixes T139.