Adds methods for getting the url for the front page or a subreddit and a method to convert it to a listing.
Fixed an author comment
Adds in getting the page for a Post (i.e. getting the comments) and comment processing
Merge pull request #2 from BrandonDusseau/thread-backend

Thread backend
Merge branch 'master' of https://github.com/BrandonDusseau/redditmtu into login-ui

Conflicts:
	redditmtu.xcodeproj/project.pbxproj