New date format

I have finished changing the appearance of dates in certificate listings. Henceforth, the portions of dates within parentheses will indicate dates that are handwritten or typewritten. The portions of dates outside of parentheses will indicate printed portions of dates.
For instance "188(6)-188(9)" means a certificate is known to have been issued from 1886 to 1889. The printed portion of the date is "188-".