Expose real page title from Article

AFAICT, there is not currently a way to retrieve the actual page title from an Article instance.

article.py has a title property, but this matches the display title rather than the actual page title. Often, these 2 are the same, but not always, so I would like to also be able to retrieve the actual page title. An example of such page would be https://en.wikipedia.org/wiki/Conditions_of_My_Parole, where the real page title is Conditions of My Parole, but the display title (which is what is available from article.title) is <i>Conditions of My Parole</i>

The real title is available in the raw dumps, but get_metadata explicitly suppresses "name" from being made available as metadata. Simply making name available from article.metadata should satisfy this task.

Note: also filed in phab.