Separate root routes for un- and authenticated users

Closes #34
Closes #47

app/controllers/application_controller.rb

@@ -31,18 +31,6 @@ class ApplicationController < ActionController::Base
     session[:revert_to_id].present?
   end
 
-  def after_sign_in_path_for(scope)
-    if current_user.at_least(:admin)
-      users_path
-    else
-      edit_user_registration_path
-    end
-  end
-
-  def after_sign_out_path_for(scope)
-    new_user_session_path
-  end
-
   class << self
     attr_reader :navigation_menu_tab
     def navigation_tab(name)