Feature: Add optional parameter to format output in json

[HyperTHD]

This feature will create an optional parameter,

-j or --json

This will allow the output to be written into an array of json objects outputted using following format,

{"url": url, "status code": status_code }

To be implemented as a part of lab 3

[HyperTHD]

Issued resolved with the following commit 6d19820