- split out simple-scan custom element and its styling into seperate files
 * removed clutter from index.html
 * also fixed css issues (present in recent chrome, that does not rely on
polymer.js polyfills anymore)
 * overall ui and markup cleanup

- added correct initialization of serial/laser/stepper status on connection with server
 * modified client side accordingly (socket-io event handlers, flags, etc)
 * added status flags to server and emmiting of status data upon client connection