Add ability to make comments on a post #23
Description
The user should be able to navigate to any post and click a button to make a comment. A text box should appear that will allow them to enter and publish a comment. This must be pushed out to only the friend who owns the post, who will then push it out to all their friends. This is because commenting user and posting user may not have the same set of friends. This process will avoid sending out updates to users who cannot see the original post.