added logic to user show partials _published_blog_list and _unpublished_blog_list
added link_to 'Admin', login_path
added link_to 'Create Account', new_user_path on user_sessions#new
added link_to 'Contact',  new_letter_path on welcomes#index
modified links on application.html.erb
added current_user logic to application.html.erb
added links for new article and letters index on user#show
added redirects after create and edit on blog article controller