Fixed redirection and saving in Players and Cars

In the database run
ALTER TABLE `j17_jigs_players` CHANGE `iduser` `id` int;
I did this for consistency in Joomla.

Several fields have been commented out in players as they don't correspond to fields in players table.
These probably need to be restored with the correct names.
Merge pull request #7 from justinkelly69/master

Made some fixes to players and cars.