I hacked in some new stuff in a coding spree:
+ daily PM send quota to prevent spamming (floor(score / 1500) + 3 pm free per day)
+ Site Admins can add site admins for their site
+ Linked Forums and threads to its Challenges (if any)
o Fixed new per language ranking when you unlink site or delete account
o Register really needs email now... the activation link was spoiled for a few months by debugging output

(dont tell that anyone)
Thanks again to all the people who report bugs or request features.
Happy Challenging !
