Make several changes to the Committers Guide:

• The CD- and DVD-set are no longer available per subscription, but at conferences
• Remove all contractions but "Who's Who"
• Several language and SGML fixes
• Fix capitalization
• Add 2008, since content changes were made last year
• Fix the logical sense of a sentence.

Reviewed by: trhodes, pgj, remko
Approved by: trhodes