Merge pull request #2 from ChrisArevalo/master

Added a datepicker to book a flight page
Moved datepicker to startup. Updated validateDate.
Logos can now be added, viewed and deleted
Cleaned up logo viewer code
Admins can now book flights
Admins can now view and delete flight bookings
Admins can now upload receipts
Admins can now view and delete receipts
Fixed bug where Rate Table wouldn't load at startup
Fixed a login bug
Table names are now stored in variables
Fixed table overflow bug
Fixed bugs where bookings and receipts wouldn't delete
Disabled user creation during setup
Fixed admin json parsing error
Moved login cookies from PHP to JS