Tellstick Support

I keep getting questions about Tellstick support in NetHomeServer, so I finally started looking into it. It seems that the low level interfaces of the TellstickDuo matches NetHome quite well, so it should be possible to write a Tellstick HomeItem that still uses the NetHome protocol encoders (so it is possible to plug in your own encoder implementations). One snag was that it was a bit messy to access the interface from Java on Windows, but I finally managed to convince the FTDI virtual com port drivers that the Tellstick really is a COM-port, and after that it was possible to use RXTX as usual.