Created Post model, add CSS, show them on user page
Added create action for posts, posts display on homepage, and a simple post show page with the hyperlink done
Added author display, removed redundant code for home, modified show page for posts
Added Votes model and controller, created upvote and downvote links
fixed vote uniqueness, hid the voting link when user already voted, created unvote link
Added error message for creating repeated votes, added vote display at post index
fixed minor display issues on user index and post index
Created comments model, added comment creation on post show page, comments display on post show page and user show page.