KAZOO-603: update formatting, atoms, etc
KAZOO-603: don't track cdr url in FSM, set default for max missed calls before logging the agent out
KAZOO-603: formatting, specs, and stuff
KAZOO-603: send amqp logout to all agents
KAZOO-603: track failed connect attempts, logging agent out after their third consecutive failure
KAZOO-603: update status report if agent supervisor has gone defunct
KAZOO-518: start custom MOH when call enters queue
KAZOO-603: add logging for unhandled messages
KAZOO-603: use elapsed_ms function instead of computing directly