3D Bus lights

You can now build the lights into the .3ds model of the bus. You must name the objects as following
 * sw_S_0 stop light OFF
 * sw_S_1 stop light ON
 * sw_IL_0 Left blinker OFF
 * sw_IL_1 Left blinker ON
 * sw_IR_0 Right blinker OFF
 * sw_IR_1 Right blinker ON
 * sw_R_0 Drive lights OFF
 * sw_R_1 Drive lights ON
 * sw_CO_0 Reverse lights OFF
 * sw_CO_1 Reverse lights OFF

To switch the old light type of, put this in the desc.bs1 NF 1