Providers are now required to state their name/package

providers/markdown/markdown.go

@@ -20,6 +20,11 @@ type Provider struct {
 	RendererOptions []renderer.Option
 }
 
+// Package fulfills the step.Provider interface.
+func (this *Provider) Package () string {
+	return "markdown"
+}
+
 // Default returns a provider with the default configuration.
 func Default () *Provider {
 	return &Provider {