0.0.8pre5

In this pre-release the following issues should have been solved, feel free to test:

• HA crashes when host is unreachable: This has been tested. When heat pump unavailable, HA keeps responding. After heatpump gets available agein, the entities are updated again. Heatpump has to be available at HA startup.
• Add support for Heizkreis 2+: Heizkreis 2 has been added for test. If you have more than 2 of them, please report of HK2 works well.
• use predefined values for WW push: This is now a select entity

Please report any issues, if there are some..