#74 serie has all or one suchwort

MetaObjectNodesStadtbildSerieSearchStatement.appendSuchworte() was
modified such that a Stadtbildserie can be found, which has all the
selected Suchworte or only one. This choice can be set via the field
hasAllSuchworte.
 #74 created Sb_minAufnahmedatumYearFetcherServerSearch

Sb_minAufnahmedatumYearFetcherServerSearch is a server search which
retrieves the year when a stadtbild was taken.
Merge branch 'feature/74-Changes-in-the-Stadtbildsuche' into dev