added support for pillars

some new helper methods/classes

floorplan/v2/FloorplanReader.h

@@ -412,7 +412,8 @@ namespace Floorplan {
 			return new FloorObstacleCircle(
 				parseMaterial(el->Attribute("material")),
 				el->FloatAttribute("cx"), el->FloatAttribute("cy"),
-				el->FloatAttribute("radius")
+				el->FloatAttribute("radius"),
+				el->FloatAttribute("height")
 			);
 		}