cleanup routes
added admin routes
added admin controller
bundled and installed devise
admin controller needs authentication, no one should have the possibility to register a new user
added admin_posts controller
added different layouts to admin controller and application controller
added admin stylesheets
added layout to admin backend and styled articles index
added simple_form and updated form partial
cleaned up posts stuff in backend
added permitted attributes to admin_posts controller
added js to admin backend
added validation to post model
added comment to friendly_id line in post model
fuck tests lol
sign out url needs http method delete
added login layout and styled login form
removed unnecessary devise views
removed tags index view