Results 5 issues of im sheng

like bootstrap,xs , sm , lg ...

![image](https://user-images.githubusercontent.com/10435075/58858821-0f0d4b00-86db-11e9-9e3d-50e7afe263b9.png) ![image](https://user-images.githubusercontent.com/10435075/58858840-1896b300-86db-11e9-88e2-7ff12fe45b67.png) dump($text1->getValue()); When my string is long and long,no return value

collection add option allow_add ? ![qq 20181117164230](https://user-images.githubusercontent.com/10435075/48659157-d0d67400-ea87-11e8-97f1-fd7d9930bf6c.png)

``` User-Agent: * Allow: /mlist Allow: /sitemap Disallow: / ``` `$parser->isAllowed('/')` is true ? on windows 10 php 7.2 version: 0.2.4

bug