Remove maintenance mode config flag.
Change notifications to include user ID and optionally device ID.
Add nsqlookupd to config files.
Switch Websocket out for SSE.
Add list of nsq topics for nsq subscribers.
Update publishing to send user and device IDs.
Updated NSQ support and added stats support.

NSQ support has been cleaned up, and now stats are supported with
options to increment, decrement, time, and set a gauge, using a
statsd client library.