v0.16.1

Pre-release 0.16.1, for testing: not the latest release, not offered as an update to stable installs.

Added

• Remove an agent from the UI. Deleting the monitor of a machine whose agent is
  online and accepts commands offers to remove the agent automatically: it stops
  and removes its service, binary and configuration (as --uninstall does), then
  the monitor is deleted. Administrator session only, recorded in the audit log
  (POST /api/targets/{id}/agent/uninstall). An agent in a container, or not
  installed by the install scripts, refuses; the manual commands stay available.