refs #369, smaller changes

* rendered attribute in CSimulatedAircraft
* Formatting
* contains in CPropertyIndex
* CAircraftModel, new type

src/blackmisc/propertyindex.cpp

@@ -121,4 +121,9 @@ namespace BlackMisc
         this->setIndexStringByList(newList);
     }
 
+    bool CPropertyIndex::contains(int index) const
+    {
+        return this->indexList().contains(index);
+    }
+
 } // namespace