Various changes

Numberous changes, no idea what the all are.

includes/debug.inc.php - created so there is an ability to turn on and
off debugging code without commenting it on or off.  Created function
dubug($message, $debug=TRUE) which will display if $debug is TRUE.  Fine
control can be given at function level, or whatever level you want.  

view/login.html.php - unknown changes.

createuser.php - unknown changes.

includes/usermanagement.inc.php - Include code to debug
addUser($username, $password).