版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/angular-utf8-base64/0.0.5/angular-utf8-base64.js
- https://cdn.bootcdn.net/ajax/libs/angular-utf8-base64/0.0.5/angular-utf8-base64.min.js
Base64 encoding/decoding with UTF8 support for AngularJS Apps