Revamped the administrator's user CP, big time. The admin module now uses a smart form and enables all profile fields, including users_extra, to be changed. Passwords are encrypted when sent. The whole CP has been split off into a different file to accomodate the large amount of code.
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Converting all tables on new installations to UTF-8; this may break MySQL 4.0 compatibility; several minor cosmetic fixes; set Powered button under Links to "on" by default
