gapi: Plumb through a URI mechanism

This is at least a stop-gap until we redo the whole filesystem API mess.
I think golang is partly to blame because they don't have proper API's
merged yet.

puppet/langpuppet/gapi.go

@@ -187,6 +187,12 @@ func (obj *GAPI) Init(data *gapi.Data) error {
 	return nil
 }
 
+// Info returns some data about the GAPI implementation.
+func (obj *GAPI) Info() *gapi.InfoResult {
+	// XXX: Do we want this or obj.puppetGAPI or something else?
+	return obj.langGAPI.Info()
+}
+
 // Graph returns a current Graph.
 func (obj *GAPI) Graph() (*pgraph.Graph, error) {
 	if !obj.initialized {