Add placeholders for users#edit and users#update actions
Define users#edit
Create users#edit show page; populate with form_for editing user attributes
Replace placeholder with link_to edit_user_path(current_user)
Define users#update
Add before_filter authorization to ensure only signed-in users can access certain actions
Add before_filter authorization to ensure users can only edit/update their own profiles
Define current_user? to query the current user
Define actions for redirection and location storage