版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/photon/0.1.2-alpha/css/photon.css
- https://cdn.bootcdn.net/ajax/libs/photon/0.1.2-alpha/css/photon.min.css
- https://cdn.bootcdn.net/ajax/libs/photon/0.1.2-alpha/fonts/photon-entypo.eot
- https://cdn.bootcdn.net/ajax/libs/photon/0.1.2-alpha/fonts/photon-entypo.svg
- https://cdn.bootcdn.net/ajax/libs/photon/0.1.2-alpha/fonts/photon-entypo.ttf
- https://cdn.bootcdn.net/ajax/libs/photon/0.1.2-alpha/fonts/photon-entypo.woff