added a varible created, and a method that checkes if a users activation key is expired , also added a varaible that has the number of days to expire #93
sets the varible created with the date of the when the uswer is created , and in the confirmVerifcation method added a check if the code is expired or not #93
 my tests
removed istaff from create super users#93
 added a popover on password #93
positining the popover #93
changed USE_TZ to false #93