added task to delete user ratings for nodes that have been removed
fixed events.add() promise not resolving when slack not configured
added some simple unit tests for prune ratings task, and ratings module
made changes to templates to display rating, count, sort by rating count
copy ratings from db to new doc when updating node
tested by walking through code in debugger locally with a few nodes and flows
added task to delete user ratings for nodes that have been removed fixed events.add() promise not resolving when slack not configured added some simple unit tests for prune ratings task, and ratings module made changes to templates to display rating, count, sort by rating count copy ratings from db to new doc when updating node tested by walking through code in debugger locally with a few nodes and flows