API project: Timestamp Microservice

    User stories:

        1) I can pass a string as a parameter, and it will check to see whether 
            that string contains either a unix timestamp or a natural language date 
            (example: January 1, 2016)

        2) If it does, it returns both the Unix timestamp and the natural 
            language form of that date.

        3) If it does not contain a date or Unix timestamp, it returns null 
            for those properties.

    Example usage:

        _Natural language date:
            https://api-project1-br4in.c9users.io/December%2015,%202015

        OR:
            https://api-project1-br4in.c9users.io/December 15, 2015

        _Unix timestamp:
            https://api-project1-br4in.c9users.io/1450137600

    Example output:
        { "unix": 1450137600, "natural": "December 15, 2015" }