Add climate control device

[coeing]

Started to add the handling for the "virtual" climate control devices. As it seems they are created automatically by the Bosch home controller for each room with a thermostat in it.

They are used to set the desired temperature (setpoint temperature) for a room and they report the temperature of a room (probably the average temperature of all thermostat temperatures in the room).

• [x] Documentation for all new classes
• [x] Make registerService private and change the usages in derived classes to use createService instead
• [x] Throw Error instead of returning Null in getBridgeHandler to avoid unnessesary null reference checks after initialization
• [x] Add @author tags to new classes

[coeing]

As the devices are created automatically it would be nice to add them automatically to openHAB as well. But I guess that's will be covered as part of the discovery feature we have to implement soon.

[coeing]

@GerdZanker @stefan-kaestle I did all the changes that you commented on. Let me know if there is anything else, otherwise I will merge the branch on Tuesday next week :)