Modified the code in db_to_servitengasse_xml, db_to_person_html and db_to_building_inc files so that for those few instances where a person has two addressess on Servitengasse, we don't get two entries e.g. in the list of people associated with a building or in the servitengasse.xml file (which is used to generate the servitengasse.json file).

Also made some tweaks to the punctuation etc. in the output and ensured that occupancy_notes field is displayed under all output circumstances in voluntary and collected instances of occupancy.