Adding <place> tags to Ithaca (17).

[charlesreid1]

Many of the tags do not contain detailed information.
However, adding tags will make it easier to go back and
parse/expand on the existing place names to fill in with more details,
more like issue #27 at open-editions/corpus-joyce-ulysses-tei and the
suggested by Caleb.

This follows Places
guidelines from TEI and doesn't deviate much from its examples.

[charlesreid1]

This also adds two cross-references, one within Ithaca (Sinbad the Sailor) and one external (buying the soap in Lotus Eaters).

The within-document reference looks like this:

<ref target="#lb_172322"><title type="pantomime">Sinbad the Sailor</title></ref> (produced by R Shelton 26 December 1892,

<p rend="non-indent"><lb n="172322" xml:id="lb_172322"/>Sinbad the Sailor and Tinbad the Tailor and Jinbad the Jailer and Whinbad

while the external-document reference looks like this:

<ref target="u05_lotus-eaters.xml#lb_050513">(bought thirteen hours
<lb n="170233"/>previously for fourpence and still unpaid for)</ref>,

<lb n="050513" xml:id="lb_050513"/><said who="lb">―I'll take this one,</said> he said. <said who="lb">That makes three and a penny.</said>

These implement the <ref> and xml:id suggestions from #23, but cross-reference events in addition to re-used phrases (also see #39 cross-reference between Wandering Rocks and Oxen of the Sun). This should help locate some of the cross-references once a convention has been settled upon.

[charlesreid1]

Removed tags per #39, will re-implement these references in a later PR.

[charlesreid1]

This pull request is now ready to merge!