API Basejump: URL Shortener Microservice

User stories:

I can pass a URL as a parameter and I will receive a shortened URL in the JSON response.
If I pass an invalid URL that doesn't follow the valid http://www.example.com format, the JSON response will contain an error instead.
When I visit that shortened URL, it will redirect me to my original link.
Example Usage:
Example Output:
{
original_url: "http://www.google.com/",
short_url: "https://vp-shorturl.herokuapp.com/1"
}