Waveman support

I have now added support for Waveman devices in NetHomeServer. Waveman sell remote controlled switches which use the 433.92MHz RF band. I got a request for the support of that protocol, and he could send samples of how the protocol looked. It proved to be almost identical to Nexa, only the off-signal differs. This in now available in the nightly builds. I have added a WavemanLamp-item and encoder/decoder for the protocol.