* tcp thread added for nonblocking mode
* sensors retrieve, thanks HTML5 :-)
* send binaryframe with a period defined in ib2_tools.js

Use Case:
- press "starttraffic" to start sending frame to tcp socket
- press "stopptraffic" to ... stop traffic
- Debug modes:
   opensocket : open tcp connection
   sendpattern: send a hardcoded raw frame

TODO:
1) make following data configurable from front end
  var serverIP = "192.168.1.82";
  var serverPort = "9099";
  var sensorPeriod = "1000";
2) Add Fablab logo and cosmetic stuffs in the front end
3) Trapp errors like connection loss
4) Add release ID :-)