re-run unchanged but date
places in names, fixed bug in comma titles

Now places which occur in "Barsoum en Name Place" column are wrapped in
a <placeName> element with a @ref pointing to the URI in the "Barsoum en
Name Place URI" column.  Also, I found a bug in the name-parts template
when it handled comma-separated titles, namely that it discarded all of
the markup generated by the name-parts-comma-separated template by
virtue of using <xsl:value-of> rather than <xsl:copy-of>.  Swapping it
to <xsl:copy-of> generated ~30 cases where a column title was output
into the TEI (which does not validate), which was caused by there being
a name in the spreadsheet which was not divided into given/family/title
names.  I still do not know what caused this brittle behavior, and it
remains.  By dividing the remaining names, column names are no longer
output into the TEI, for whatever reason.
Added place relations to persons

More place relations will come, and I still haven't put @where
attributes in birth or death events, but this is a start.