Handlebars 文档笔记: http://www.ghostchina.com/handlebars-wen-dang-bi-ji/
Handlebars模板引擎中的each嵌套及源码浅读: http://www.codedocker.com/handlebars-each-helper-and-preview-sourcecode/
Handlebars.js 模板引擎: http://www.ghostchina.com/introducing-the-handlebars-js-templating-engine/