restructured module and implmented event-listener interface
restructured module and implmented event-listener interface

beyondscreen/node-rpi-ws281x-native,raspberry-node/node-rpi-ws281x-native,beyondscreen/node-rpi-ws281x-native,usefulthink/node-rpi-ws281x-native,raspberry-node/node-rpi-ws281x-native,raspberry-node/node-rpi-ws281x-native,usefulthink/node-rpi-ws281x-native,usefulthink/node-rpi-ws281x-native,beyondscreen/node-rpi-ws281x-native