nodejs 音译(transliteration)模块，支持中文转拼音或生成 slug

https://github.com/andyhu/node-transliteration
用法：
var transliteration = require('transliteration');
transliteration.transliterate('你好，世界'); // Ni Hao ,Shi Jie
transliteration.slugify('你好，世界'); // ni-hao-shi-jie
transliteration.slugify('你好，世界', {lowercase: false, separator: '_'}); // Ni_Hao_Shi_Jie