Hahomematic

- Reduce back to parameters with events
- Rewrite climate-entity creation
- Refactor to Async
- Remove entity_id and replace by unique_id
- Reorg Client/Server/Caches
- Use One Server per backend (CCU/Homegear) with multiple clients/interfaces
- Define device_description for custom_entities
- Create custom_entities for climate, cover, light, lock and switch
- Maintain ignored parameters
- Add collection with wildcard parameters to ignore
- Enable click, impulse and alarm events
- Add connection checker

- Use input_select for ENUM actors (Issue 8)
- Added `DEVICE_IN_BOOTLOADER` and `INSTALL_TEST` to ignored parameters
- Create `switch` for type `ACTION` for parameters with only write-flag
- Create `number` for type `FLOAT` for parameters with only write-flag
- Add exceptions to abort startup under certain conditions
- Refactoring, introduce `Device` class
- Allow to fetch single paramset on demand
- Renew JSON-RPC sessions instead of logging in and out all the time

- Initial testing release