repository and license field warnings in npm install

[octavio-orozco2]

After invoking npm install you get repository and license field warnings:

$ npm install
aws-nodejs-sample
├─┬ aws-sdk@2.4.0
│ ├── jmespath@0.15.0
│ ├── sax@1.1.5
│ ├── xml2js@0.4.15
│ └─┬ xmlbuilder@2.6.2
│ └── lodash@3.5.0
└── node-uuid@1.4.7

npm WARN aws-nodejs-sample No repository field.
npm WARN aws-nodejs-sample No license field.
aws-nodejs-sample$

One solution is in: #4.