Change <emph> to <title> where appropriate

[JonathanReeve]

Follow conventions from Ulysses issue #3 for this one.

An example from "An Encounter":

little library made up of old numbers of <title type="book">The Union Jack</title>,

[JonathanReeve]

There are also some books mentioned at the beginning of Araby. It'd be great to mark these up with <title> and also to have XML ids and bibliographic references for them, and some kind of external link. An Open Library link would be a good idea . The Memoirs of Vidocq from "Araby" could be linked to this:

https://openlibrary.org/works/OL2474578W/Memoirs_of_Vidocq

And to this, on Project Gutenberg:

https://www.gutenberg.org/ebooks/38057

[JonathanReeve]

I also recently found this, which seems like it could be of use. It would be nice to link to these entries, too:

http://dublinersbookshelf.org/index.html

[workshub]

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