aurora

Results 4 issues of aurora

![image](https://user-images.githubusercontent.com/12131942/38720225-fd75b9f0-3f27-11e8-8f07-a0c2ba7ad9d5.png) ![image](https://user-images.githubusercontent.com/12131942/38720309-60b8f284-3f28-11e8-84e2-236dc3493c35.png)

Manually add guard to distinguish between different scopes.

I had the same problem #21 ,and try to modify `allowed_tlds` array, but no resolve. So I found the following code: ```php protected function getRequestTld() { $requestHost = parse_url(Request::url())['host']; $exploded...

当连续两次点击生成二维码,第一次的二维码并没有清除