Add new features and their documentation to keramida's 'checkupdate'
utility:

• "compact mode": generate a compact report for commit logs
• "patch mode": the long awaited ``patch preview'' mode :) (supports both cvs and svn)
• "picky mode": a few enhancements for creating more reasonable reports (enabled by default, but one can turn them off)

Reviewed by: keramida
Approved by: keramida