Added test for anonymous uploads
Fixed page exit confirmation
Removed print_r from banned functions

Used by HttpHelper to report json encoding problems.
Fixed file size check in FileService::download()
Added protection against too big uploads
Fixed MIME retrieval for files
Improved stylesheet
Hidden user tabs if only basic info is available
Changed times on user profile to relative form
Fixed forms width on Chrome
Added border to focused input
Centered help text in login form
Beautified checkboxes and radioboxes
Changed access rank <select> to radio boxes
Added privileges for staff to view e-mails
Fixed bad message when setting e-mail to empty
Allowed setting e-mail to empty after activation
Fixed unserializing enum values
Fixed retrieving total record count
Unified style for clickable buttons