Update Bose Soundtouch (libsoundtouch) to version 0.80+

libsoundtouch has been significantly improved between the version hass is currently using (0.7.2) and the latest version on github (0.8.0):


Bose’s Soundtouch API has also been improved since version 0.8.0 with asynchronous api calls:


Update: see this great post on an initial effort for this feature request: Bose Soundtouch - Source selection & presets