Merge branch 'master' into v0.6.0

# Conflicts:
#	nix/build-all.py
#	src/ifcgeom/IfcGeomFunctions.cpp
#	src/ifcparse/IfcLogger.cpp

src/ifcparse/IfcLogger.cpp

@@ -45,7 +45,11 @@ namespace {
 		}
 		os << message << std::endl;
 		if (instance) {
-			os << instance->data().toString() << std::endl;
+			std::string instance_string = instance->data().toString();
+			if (instance_string.size() > 259) {
+				instance_string = instance_string.substr(0, 256) + "...";
+			}
+			os << instance_string << std::endl;
 		}
 	}