Added table to store the login-attempts
Added a field to store the blocked-status
Reset blocked_on-date
Added properties to store the blocked-on-status
Check if the user isn't blocked.
Convert into a timestamp, so our initialize-method won't fail.
Save the blocked-status
When a known user has attempted to login for 7 times we will block his user.
Made it possible to block/unblock users through the interface.
Don't let users block themself