MatchError for rss extension

[evantravers]

I'm back to playing with tableau again, and I was running into the same MatchError as #131, only it's for the RSS extension not the Tag.

I haven't been able to figure out exactly where it's showing up… I suspect it's somewhere in here:

tableau/lib/tableau/extensions/rss_extension.ex

Lines 50 to 62 in a00c958

	def config(config) do
	unify(
	oneof([
	map(%{enabled: false}),
	feed_s(&map/1),
	map(%{
	enabled: true,
	feeds: keyword(values: feed_s(&keyword/1))
	})
	]),
	config
	)
	end

I'm sitting a waiting room trying to find it.