#19 Joystick open/close/init/etc.

[Richard Rauch]

Consider adding client-access to control how the
joysticks are initialized.

Especially the client may want to know where to find a
USB joystick that the user claims is attached. (Perhaps
it is good enough to just have N joysticks, though, and
expect the client to let the user say which one they
want---either by giving a number or by, say, pressing a
key (and iterating the joystick ID number) until the
user is happy.)