版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/jquery.gridster/0.5.6/jquery.gridster.css
- https://cdn.bootcdn.net/ajax/libs/jquery.gridster/0.5.6/jquery.gridster.js
- https://cdn.bootcdn.net/ajax/libs/jquery.gridster/0.5.6/jquery.gridster.min.css
- https://cdn.bootcdn.net/ajax/libs/jquery.gridster/0.5.6/jquery.gridster.min.js
- https://cdn.bootcdn.net/ajax/libs/jquery.gridster/0.5.6/jquery.gridster.with-extras.js
- https://cdn.bootcdn.net/ajax/libs/jquery.gridster/0.5.6/jquery.gridster.with-extras.min.js