* Update config file loading. Each device will load the ``global`` section followed by it's own section of the provided config (router for emq-router, jobmanager for emq-jobmanager, etc)
* Allow configurations options to be set via command-line.
Backwards incompatible changes
* `emq-pubsub` has been renamed to `emq-publisher`
* Configuration: The name and section for the listening addresses has changed:
* Job Manager: `WORKER_ADDR` is now `CONNECT_ADDR` in the `[jobmanager]` section
* Job Manager: `WORKER_ADDR_DEFAULT` is now `CONNECT_ADDR_DEFAULT` in the `[jobmanager]` section
* Job Manager: `WORKER_ADDR_FAILOVER` is now `CONNECT_ADDR_FAILOVER` in the `[jobmanager]` section
* Publisher: `PUBLISHER_FRONTEND_ADDR` is not `FRONTEND_LISTEN_ADDR` in the `[publisher]` section
* Publisher: `PUBLISHER_BACKEND_ADDR` is not `BACKEND_LISTEN_ADDR` in the `[publisher]` section
* Router: `FRONTEND_ADDR` is now `FRONTEND_LISTEN_ADDR` in the `[router]` section
* Router: `BACKEND_ADDR` is now `BACKEND_LISTEN_ADDR` in the `[router]` section
* Scheduler: `SCHEDULER_ADDR` is now `CONNECT_ADDR` in the `[scheduler]` section
* `RQ_HOST` is now `REDIS_HOST`
* `RQ_PORT` is now `REDIS_PORT`
* `RQ_DB` is now `REDIS_DB`
* `RQ_PASSWORD` is now `REDIS_PASSWORD`
* `ADMINISTRATIVE_ADDR` is now `ADMINISTRATIVE_LISTEN_ADDR` in each respective section
* `CONNECT_ADDR_DEFAULT` has been removed from the `[jobmanager]` section. HA will be retooled and added back in the High Availability Milestone.
* `CONNECT_ADDR_FAILOVER` has been removed from the `[jobmanager]` section. HA will be retooled and added back in the High Availability Milestone.
* Configuration: Command line options for emq-jobmanager
* `--broker-addr` `-B` has been renamed to `--connect-addr` `-A`
* `--jobs` has been renamed to `--concurrent-jobs`
fixes: #20