bug fixes

included other files to make functions work. Still error
“Catchable fatal error: Argument 4 passed to Rank::__construct() must
be an instance of EmployeeType, string given, called in
/Applications/XAMPP/xamppfiles/htdocs/xampp/CS546/classes/DBInterface.ph
p on line 273 and defined in
/Applications/XAMPP/xamppfiles/htdocs/xampp/CS546/classes/Rank.php on
line 20”