Fix BlackCore header includes

* Include only what is used
* Use forward declaration when possible
* Sorted includes

refs #598

src/blackcore/data/vatsimsetup.h

@@ -14,11 +14,17 @@
 
 #include "blackcore/blackcoreexport.h"
 #include "blackmisc/datacache.h"
+#include "blackmisc/metaclass.h"
 #include "blackmisc/network/serverlist.h"
 #include "blackmisc/network/urllist.h"
+#include "blackmisc/network/user.h"
+#include "blackmisc/propertyindex.h"
+#include "blackmisc/timestampbased.h"
 #include "blackmisc/valueobject.h"
 #include "blackmisc/variant.h"
-#include <QStringList>
+
+#include <QMetaType>
+#include <QString>
 
 namespace BlackCore
 {