KAZOO-543: fix typo
KAZOO-714: formatting and handle basic.cancel_ok
KAZOO-714: formatting updates
KAZOO-714: formatting
KAZOO-543: don't send presence update if unknown agent
KAZOO-543: update handling of queue presence
KAZOO-543: formatting update
KAZOO-657: add restart commands for agents/accts
KAZOO-657: agent maintenance methods