Add test for DeviceStatePanGatewayService1
Add target + site tests to DeviceStatePanGatewayService tests
Separate the different lines in the data in message_test to make it easier to read
Add test for decoding LightState message
Add tests for power on/power off messages
DeviceStatePower is actually a pingback from the bulb

So there's no need for 'on' or 'off' tests
Add TestDeviceSetPower tests
Merge pull request #4 from radar/message-testing

Add beginnings of testing for messaging