Add importing html and save it to Article

Additionally defines a wizard logic which is partially unused yet.

lib/outlook/articles.ex

@@ -35,7 +35,10 @@ defmodule Outlook.Articles do
       ** (Ecto.NoResultsError)
 
   """
-  def get_article!(id), do: Repo.get!(Article, id)
+  def get_article!(id) do
+    Repo.get!(Article, id)
+    |> Repo.preload([:author])
+  end
 
   @doc """
   Creates a article.