Fix not logged in users being treated as super admins.
(intval(NULL), intval(""), etc. returns 0 which is less than 10 and so becomes superadmin uid)
Added phPass library.
Configure and integrate phPass library.
Added provisional code for upgrading plain md5 hashes to the phpass hashes.
Upgrade password column in ff_persons table to varchar(60) to fit the new hashes (temporary patch - could also be done manually instead)
Fix security hole allowing anyone to change the password of anybody with a blank user activation key (all users that have activated their accounts)
Merge pull request #20 from kbhff/security

New password hashes + misc security fixes