Restored EAD 2002 definition for table
Restored <row> to EAD2002 specs

Eliminated e.thentry and a.entry, now just e.entry
Created a.valign

Added necessary references
Added another ref to a.valign
Created a.align
Replaced align definitions with refs to a.align
Tidy
Created av.zeroorone
Replaced av.yesorno with av.zeroorone

For attributes colsep, rowsep, and pgwide
Changed av.zeroorone to NMTOKEN

Now matches EAD 2002 values for colsep, rowsep, and pgwide exactly,
although uses new define name to void conflict with av.yesorno in EAD3
Merge pull request #388 from SAA-SDT/restore_table

Restore table