Fix BlackMisc header includes

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

refs #630

src/blackmisc/simplecommandparser.cpp

@@ -7,8 +7,12 @@
  * contained in the LICENSE file.
  */
 
-#include "simplecommandparser.h"
 #include "blackmisc/pq/pqstring.h"
+#include "blackmisc/simplecommandparser.h"
+
+#include <QList>
+#include <Qt>
+#include <QtGlobal>
 
 using namespace BlackMisc::PhysicalQuantities;