nrm can help you easy and fast switch between different npm registries,
nrm
now include: npm, cnpm, taobao, nj(nodejitsu).
npm
cnpm
taobao
nj(nodejitsu)
安装 : $ npm install -g nrm
$ npm install -g nrm
nrm ls : 查看安装源
nrm - NPM registry manager
原文：https://www.cnblogs.com/noraZhang/p/13086903.html
