sorry, sometimes I explain myself like a rock :D

I just mean to get the milisecond value out
`var SCAN_TIMEOUT = 10000;`
so later we can call it from the timeout
```
scanTimeout = setTimeout(function() {
        self._scanning = false;
        console.warn('Timeout while reading networks');
        callback();
      }, SCAN_TIMEOUT);
```

I think it would make code little cleaner.