Removed empty unit date element

Markup on <unitdate era="ce" calendar="gregorian"/> this is on line 85
in the file.
fixed <did> elements

<did> Elements and unittitles marked up incorrectly

git-svn-id: https://subversion.lib.virginia.edu/repos/ead/branches/pub-schema/uva-sc@10782 6d43c525-cd11-0410-ac62-a67304e79d8a
Merge branch 'pub-schema' of https://github.com/uvalib-dcs/VH_uva-sc into pub-schema
Removed empty unit date element

Markup on <unitdate era="ce" calendar="gregorian"/> this is on line 85
in the file.
Merge branch 'pub-schema' of https://github.com/uvalib-dcs/VH_uva-sc into pub-schema
Removed empty unit date element

Markup on <unitdate era="ce" calendar="gregorian"/> this is on line 85
in the file.

git-svn-id: https://subversion.lib.virginia.edu/repos/ead/branches/pub-schema/uva-sc@10807 6d43c525-cd11-0410-ac62-a67304e79d8a
Fixed missing <unittitle> in id="d1e273997"

Changed head tag to unit tag and reposition <did> tag
Fixed unit date tags and moved ca. meaning circa outside of date tags
Fixed Unitdate tag to wrap date only
Test reformatting in Oxygen

test
Merge branch 'pub-schema' of https://github.com/uvalib-dcs/VH_uva-sc into pub-schema
(merge lorrie's changes)

git-svn-id: https://subversion.lib.virginia.edu/repos/ead/branches/pub-schema/uva-sc@10831 6d43c525-cd11-0410-ac62-a67304e79d8a
Merge branch 'pub-schema' into pub-dtd
some formatting changes and removal of empty elements for ArchivesSpace import