Update UtilityComponent to use PDO
Add missing license headers
MySQL blob or text fields cannot have a default value
Small tweaks to some SQL scripts
Tidy index page and do not require log directory to be writable
Enable use of memcache
Tweak logging to set correct levels for development and production

Also ensure log directory does not need to be writable
Update more license headers and tweak arrangement of files
Update PHPUnit to 3.5.15
Remove unused files