Made the profile cntroller allow a logged-in user to follow/unfollow a profiled user; made the dashboard route query and retrieve all the posts by logged-in user's followees as the route's model; made the profile.index route query and retrieve all the profiled user's posts as the route's model; made the profile.following route query for and retrieve all the profiled user's followees as the route's model; made the profile.followers route query for and retrieve all the profiled user's followers as thr route's model.