Version bump + Script to prepare images
Refactored code to get the mac address in a separate file
Completely refactored the code in classes and support for remote logging

 * Code split in:
  * AsteroidClient: manages the connection to the asteroid server through the DDP protocol
  * AsteroidVM: runs snippets of code in a 'sandboxed' environment
  * AsteroidConsole: logs to the console and emits events so that AsteroidClient can also log to the server
 * pi-steroid.js now uses commander for command line parsing
Scripts can call require + Messages logged in case of error