Fix BlackCore header includes

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

refs #598

src/blackcore/audiodevicevatlib.cpp

@@ -9,9 +9,12 @@
 
 //! \cond PRIVATE
 
-#include "audiodevicevatlib.h"
+#include "blackcore/audiodevicevatlib.h"
 #include "blackmisc/logmessage.h"
 
+#include <QString>
+#include <QtGlobal>
+
 using namespace BlackMisc;
 using namespace BlackMisc::Audio;
 using namespace BlackMisc::Aviation;