Create NPM package

* Add package.json to store package details

* Add express, cors, and mongoose as package dependencies
Build RESTful API

A very simple REST API for the application running as a server on Node.
It allows users to create, read, update and delete (CRUD) Notes stored
in a mongo database. It uses HTTP verbs (GET, PUT, POST, DELETE) to
accomplish this.

    * Add morgan for logging

    * Add body-parser for request parsing
Bump version number and update README

Moved from v0.0.0 to v0.1.0 seeing as the API is built up. Also added a
bit more information to the README.md about what this project is about.