Return CORS headers, that allow everything.

http_listener.go

@@ -7,5 +7,7 @@ import (
 
 func (pool *Pool) getRoot(w http.ResponseWriter, r *http.Request) {
 	//fmt.Printf("got / request\n")
+	w.Header().Set("Content-Type", "application/json")
+	w.Header().Set("Access-Control-Allow-Origin", "*")
 	io.WriteString(w, string(pool.jsonst)+"\n")
 }