docs/revamped status (#462)

* fix broken image link in README

* add new commands to the command line page

* add monitoring docs layout and complete status cmds page

* fix bug with dumping queue-info to files

* add docs for queue-info

* add documentation for 'query-workers'

* add reference to new query-workers docs and split a paragraph

* fix small bug with --steps option of monitor

* add documentation for monitor command

* update CHANGELOG

* fix dump-csv image for queue-info

Author: bgunnar5