Next and previous track command not working in Spotify SingleRoom mode

[B5r1oJ0A9G]

          allright, now it partly works for me, I don't know what exactly changed, I did a ton of restarting, reinstalling and so on concerning other problems. HA still does not realize if music is playing via spotify multiroom. If I hit play though, it starts playing from the multiroom speaker. Background-image still does not appear, but who cares. What bothers me is that i cant skip or replay songs. Imma just dump the log report here, can't make out what is of relevance and what not

` [140228859544000] 'HassRaumfeldHost' object has no attribute 'async_room_next_track'

Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/components/websocket_api/commands.py", line 193, in handle_call_service
await hass.services.async_call(
File "/usr/src/homeassistant/homeassistant/core.py", line 1704, in async_call
task.result()
File "/usr/src/homeassistant/homeassistant/core.py", line 1741, in _execute_service
await cast(Callable[[ServiceCall], Awaitable[None]], handler.job.target)(
File "/usr/src/homeassistant/homeassistant/helpers/entity_component.py", line 204, in handle_service
await service.entity_service_call(
File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 680, in entity_service_call
future.result() # pop exception if have
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 964, in async_request_call
await coro
File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 717, in _handle_entity_call
await result
File "/config/custom_components/teufel_raumfeld/media_player.py", line 419, in async_media_next_track
await self._raumfeld.async_room_next_track(self._room)
AttributeError: 'HassRaumfeldHost' object has no attribute 'async_room_next_track'
`

Originally posted by @MaxSchuck in #4 (comment)

[B5r1oJ0A9G]

teufel_raumfeld is using (currently) incorrect function calls from hassfeld for playing next or previous tracks. In fact, the functions are not consistently correct defined in hassfeld.

[B5r1oJ0A9G]

The function names are corrected now in hassfeld with its release of version 0.3.11-alpha2. This new version will be used by teufel_hassfeld in the current master branch.

@MaxSchuck,
@ulilicht,
Please consider to test the current master branch and report back whether the error is fixed.

[B5r1oJ0A9G]

Released in v0.1.13-alpha1.