Kraken 是 Paypal 公司的一个开源的 Node.js 的 Web 框架。
目录结构：
- /config - Application and middleware configuration
- /controllers - Controllers
- /lib - Custom developer libraries and other code
- /locales - Local-based content
- /models - Models
- /public - Web resources that are publicly available
- /public/templates - Server and browser-side templates
- /tests - Unit and functional test cases
