[Ohrrpgce] Crufty arrowsets

[Ralph Versteegen]

James, is there any reason that all these arrowset functions read
keyboard keys, to which gamepad buttons have been mapped, instead of
just reading a gamepad directly?
I'l like the get rid of all of these functions, and instead handle
controls in allmodex, with multiple carray() arrays, one per player.
Since multiple gamepad support is only used for Ouya, which is dead, I
guess I don't need to worry too much about not breaking anything, as
long as at least the first arrowset continues to work.

Also, my plan is to make the second argument to keyval/keyispressed
specify the joystick number if used with a joy: constant, specify the
player number if used with a "* key" virtual key code, and do nothing
with key: constants.