refs #418, ICAO data for reader

* value objects and respective lists
* adjusted CAircraftIcao to use new classes
* some smaller fixes, Doxygen
* reader for values from database JSON values
  http://vatrep.vatsim-germany.org/service/allaircrafticao.php?rows=10000&sord=asc
* Related: Slightly improved signals for VATSIM reader

src/blackmisc/aviation/aircrafticaocodelist.cpp

@@ -0,0 +1,32 @@
+/* Copyright (C) 2015
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "aircrafticaocodelist.h"
+
+namespace BlackMisc
+{
+    namespace Aviation
+    {
+
+        CAircraftIcaoCodeList::CAircraftIcaoCodeList(const CSequence<CAircraftIcaoCode> &other) :
+            CSequence<CAircraftIcaoCode>(other)
+        { }
+
+        CAircraftIcaoCodeList CAircraftIcaoCodeList::fromDatabaseJson(const QJsonArray &array)
+        {
+            CAircraftIcaoCodeList codes;
+            for (const QJsonValue &value : array)
+            {
+                codes.push_back(CAircraftIcaoCode::fromDatabaseJson(value.toObject()));
+            }
+            return codes;
+        }
+
+    } // namespace
+} // namespace