Initiate upload of the WMBus binding

The first upload.

It's roughly done and many things are to be completed.
I deliver with this binding a library, which is able to handle all Frames coming from WMBus devices.

TODO:
- Add comparison of Serial Numbers to exclude unwanted devices sending to the receiver. (Such as your neighbour's meters)
- Add compatibility to use the global configuration file instead of defining the configuration in one of the Items.

This binding is brought to you by the contributors of the Smart Home project group of LS KT at the TU Dortmund