Add Account model, Accounts controller and views. Update styles.
Add bcrypt gem
Add Sessions controller and login capability.
-known issues: fix css for login/logout links
-logged in status detected, but logout link not appearing
-add dashboard for logged in users
Add attr_accessor for password, password_confirmation
Fix logout message. Add helper method current_account
Add dashboard controller/views, routes. Update css styles
-route to dashboard show after login
-route to login after logout
-move create account/logout/login links to header