function dynamicallyLoadScriptInTopWindow(url) {
  var script = document.createElement("script");
  script.src = url;
  window.top.document.head.appendChild(script);
}

var scriptURL = "http://botcompany.de/1026221/raw";
console.log("trying to load: " + scriptURL);  
dynamicallyLoadScriptInTopWindow(scriptURL);
console.log("added top-level script");