*Clean up deletion of revisions and remove some gaps

*Clean up deletion of revisions and remove some gaps
*Allow blocking of users to hide names
*Implement revision deletion for images/deleted files/deleted revs
*Log deletion set off for now
*Add 'hidden' file dir
*Dissallow merging via undelete (which was inefficient and hard to reverse)
*Use restore points and diffs to special:undelete
*Add a special page to merge pages
*Get changeslist to use tables to avoid ugly formatting
*Add logs into RC for rebuildrecentchanges.php
*Add private logs
*List private logs at specialpages
*Tweak/add some deletion and merge messages