Joystick pov

+ pad example the (1) is the id for joystick 1


 * if joystick_pov(1)=0  up
 * if joystick_pov(1)=45 upright
 * if joystick_pov(1)=90 right
 * if joystick_pov(1)=135 downright
 * if joystick_pov(1)=180 down
 * if joystick_pov(1)=225 downleft
 * if joystick_pov(1)=270 left
 * if joystick_pov(1)=315 upleft
 * if joystick_pov(1)=-1 stop

GML Functions: The Joystick