Idea: Add possibility to switch the Link Audio Delay for the speaker-group

[lowEagle]

Hi there,

first of all thank you for your adaption, I really like the new integration into HA.
As I tend to switch between the setting for Link Audio Delay depending on whether I watch a movie or listen to audio (lip_sync vs audio_sync), it really would be nice if this would also be possible from within HA.

I already tested the required API calls manually:
http://{host}/YamahaExtendedControl/v1/{zone}/setLinkAudioDelay?delay={option}
with option being one of the following parameters
audio_sync, balanced, lip_sync

Maybe you can find the time to include this into pymusiccast as I don't feel like a good enough programmer to mess with your code by myself.

Thanks :)