Fix parenthesis in person names (<forename> Ulrich [</forename>  ->  <forename> Ulrich</forename> [)
add unkown settlement types
Extend recognition of mentionings (ignore commata and white spaces at the end of mentionings as they are inconsistent and often not intended, allow more than one affix, eg. (nach) (a))
Fix unknown settlement types and allow mentionings to consist of two dates