Resolve reviewer comments

- Delete unneeded include
- Change order of includes in main

Signed-off-by: schroedtert <t.schroedter@fz-juelich.de>

src/main.cpp

@@ -29,6 +29,8 @@
 #include "petrack.h"
 #include "helper.h"
 #include "tracker.h"
+#include "IO.h"
+
 
 // Aufrufbeispiel:
 // release/petrack.exe -sequence ../../einzelbilder/wert0001.png -autoSave dir|ttt.avi