Changes
* Added NetworkScan class
_This returns a list of Google devices on the network._
[File with usage example here.](https://github.com/ludeeus/GHLocalApi/blob/master/examples/get_units.py)
python
Example result
[{'host': '192.168.2.136', 'model': 'Chromecast Ultra', 'name': 'ChromeCast ULTRA', 'bluetooth_supported': False}, {'host': '192.168.2.234', 'model': 'Google Home Mini', 'name': 'Living Room', 'bluetooth_supported': True}]