fixed API->createInstance(<name>), now returns a Instance class

Author: mxschmitt

src/API.php

@@ -414,10 +414,11 @@ public function getInstances()
  */
  public function createInstance($nickname = "SinusBot MusicBot", $backend = "ts3")
  {
- return $this->request('/bot/instances', 'POST', [
+ $resp = $this->request('/bot/instances', 'POST', [
  "backend" => $backend,
  "nick" => $nickname,
  ]);
+ return $this->getInstanceByUUID($resp['uuid']);
  }
 
  /**