this commit finally adds the VivoxVoiceModule: it supports positional
as well as conference call type voice (currently only per region
server), region and parcel voice, speaker indication (LL client
family), direct avtar-to-avatar voice chat. NOTE: you need to obtain
an customer admin account from Vivox to be able to use this module ---
DON'T ask me about how to about an admin account, i've NO clue, we
just wrote this code.
7a4abf0def