Dsc 807

Hi Terence,

This request includes additional EAD fields for work display.  Could you please review the changes?

Thanks,
Shuang
Not sure whether subunittype and subunitno applies to EAD component works now that new amberdb fields componentLevel and componentNumber are created to store the values from EAD.  You're right both fields are editable via the work edit screen though.  I'll leave these fields in the display for now.