Displaying CITES listing changes
Displaying EU Listings
moved timelines code to checklist namespace and switched from as_json to serializers; started work on cascading listing changes
some progress towards a materialized view with cascading listing changes
Merge branch 'legislation_cascading' of github.com:unepwcmc/SAPI into legislation_cascading

Conflicts:
	app/models/m_listing_change.rb
	db/plpgsql/018_applicable_listing_changes_for_node.sql