* Kodi specific services to call Kodi API methods
- new service: `kodi_execute_addon` to run a Kodi Addon with optional parameters. Results of the Kodi API call, if any, are redirected in a Home Assistant event: `kodi_execute_addon_result`.
- new service: `kodi_run_method` to run a Kodi JSONRPC API method with optional parameters. Results of the Kodi API call are redirected in a Home Assistant event: `kodi_run_method_result`.
- Add descriptions in services.yaml.
- Add `timeout` parameter to yaml config (needed to make slow queries to the JSONRPC API, default timeout is set to 5s).
- Trigger events with the results of the Kodi API calls, with:
```
event_data = {
'result': api_call_results,
'result_ok': boolean,
'input': api_call_parameters,
'entity_id': 'media_player.kodi'}
```
* no need to clean OrderedDicts; no need for the `kodi_execute_addon` service
* no need for the `kodi_execute_addon` service
* unused import
* naming changes
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