Merge branch 'dev' into 'master'

CityDoctor Version 3.18.0

See merge request !37

CityDoctorParent/CityDoctorModel/src/test/java/de/hft/stuttgart/citydoctor2/datastructure/CompositePolygonTest.java

@@ -16,7 +16,7 @@ public class CompositePolygonTest {
         ParserConfiguration config = new ParserConfiguration(8, false);
         CityDoctorModel m = CityGmlParser.parseCityGmlFile("src/test/resources/FZK_haus.gml", config);
 
-        Building b = m.getBuildings().get(0);
+        Building b = m.getBuildings().toList().get(0);
         assertNotNull(b);
         assertFalse(b.getBoundarySurfaces().isEmpty());
         for (BoundarySurface bs : b.getBoundarySurfaces()) {