Add Simple audio backend
Add Simple audio backend

Uses simple command line tools to play audio. This replaces the mpg123 and the pogg123 backends.

linuxipho/mycroft-core,MycroftAI/mycroft-core,Dark5ide/mycroft-core,MycroftAI/mycroft-core,forslund/mycroft-core,linuxipho/mycroft-core,forslund/mycroft-core,Dark5ide/mycroft-core