KAZOO-2572: track whether the local ecallmgr is handling a particular call
KAZOO-2572: updated little bits of nodedown handling
KAZOO-2572: when flushing channels, publish CHANNEL_DISCONNECTED events
for any channels being handled by the local ecallmgr node. Apps can
optionally subscribe for these events and take action accordingly.
KAZOO-2572: watch startup pid and log when it finishes.

add specs
KAZOO-2572: publish channel_connected event when resyncing with FreeSWITCH
KAZOO-2572: config flag for publishing reconnects, false by default
KAZOO-2572: handle disconnect event as destroy (clear appropriate BLF)

also updates for dialyzer
KAZOO-2572: listen for disconnects, updates for formatting
KAZOO-2572: do not worry about inception, as well as avoid crash when its inbound off-net
Merge pull request #388 from 2600hz/KAZOO-2572

Kazoo 2572