Created a.entry, applied to thentry and entry
Created a.entry, applied to thentry and entry

This is to address Henny's comment on #249 where he noted that thentry
and entry should share the same attributes.  Creating a model and
referencing it in both elements is the easiest way to apply them to
both.

SAA-SDT/EAD-Revision,SAA-SDT/EAD-Revision,SAA-SDT/EAD3,SAA-SDT/EAD3,informaticmonad/EAD3,informaticmonad/EAD3