npm 安装远程包（github的）

npm install git+ssh://git@github.com:xxx/xxx.git#master --save-dev

npm install git+ssh://git@github.com:npm/npm.git#v1.0.27

npm install git+https://isaacs@github.com/npm/npm.git

npm install git://github.com/npm/npm.git#v1.0.27

https://docs.npmjs.com/cli/install