Get comments from given post

[kaanyagci]

For instance, we're scraping only messages published in a Facebook Group. We need to get comments on this message and comments on a comment.

• [x] #52
• [ ] A comment object can be like as follows:

{
id: String,
parent: String,
author: String,
content: String
}

The id the id of the comment (that we got as for post from the date's link href) ,parent will be the id of the parent, id will be the id of the comment, author the name of the author and content the content of the comment.