Add support for experimental properties markup in omero.properties
Do not blacklist individual properties
OMERO.editor deprecation: remove from the build system
Fix build target
Use DEVELOPMENT rather than EXPERIMENTAL to match OMERO.web properties
omero.properties: add DEV explanation
Use HTTP rather than HTTPS
add newly annotation entities to disk usage count

arising from https://github.com/openmicroscopy/openmicroscopy/pull/2412
include pyramid lock files in disk usage calculation
Add getter and setter methods for _event_context in CLI

Also fix the corresponding integration tests
Add getter and setter methods for _client in CLI
Adding 5.1.0-m1 to version history doc
Delete editor code.
Remove ref to "editor"
Remove ref to editor ns.
Remove smart folder for protocol.
Remove ref to editor from browser.
Remove ref to editor icon.
Remove ref to editor icon.
Remove remaining ref to ns.