Convert lib files to model concerns
Fix some deprecation warnings
Fix rubocop warnings
Fix new rubocop warnings
Fix rubocop warnings
Standardise on double quoted strings
Fix most auto-correctable rubocop issues
Cleanup trailing whitespace
Eliminate deprecated scope and association arguments
Fixing review comments Added scoping for unredacted items, cleaned up authorization and railsified old_node_controller.
Adding first cut of Redactions support Redactions support hiding historical versions of elements and collecting meta-data about that action together.