Updates the readme with improved example.
Updates the readme with improved example.

Jonekee/node-bluetooth-serial-port,edsadr/node-bluetooth-serial-port,edsadr/node-bluetooth-serial-port,Jonekee/node-bluetooth-serial-port,Jonekee/node-bluetooth-serial-port,tobyschneider/node-bluetooth-serial-port,tobyschneider/node-bluetooth-serial-port,Jonekee/node-bluetooth-serial-port,edsadr/node-bluetooth-serial-port,Jonekee/node-bluetooth-serial-port,edsadr/node-bluetooth-serial-port,tobyschneider/node-bluetooth-serial-port,tobyschneider/node-bluetooth-serial-port,tobyschneider/node-bluetooth-serial-port,edsadr/node-bluetooth-serial-port