KAZOO-874: formatting, specs, and strip extension off the tts request
KAZOO-874: modify how we find the account id, to allow for whapps_call and wh_json objects
KAZOO-874: tickies and formatting
KAZOO-874: fetch from an account, then from global settings (if not in account)
KAZOO-874: map tts to playback
KAZOO-874: create the playback command for saying tts using non-flite engine
KAZOO-874: doc updates
KAZOO-874: ticky some atoms
KAZOO-874: handle/ignore some messages recv from gen_listener