KAZOO-3048: track the call record for the participant
KAZOO-3048: use the tracked call record to get the prompt (respecting language)
KAZOO-3048: spec updates
KAZOO-3048: bring cb_conferences up to snuff
KAZOO-3048: track call for participant in conference record
KAZOO-3048: formatting
Merge pull request #597 from 2600hz/KAZOO-3048

Kazoo 3048