Separated main code from UI and PLATform support code, plus other generally small fixes here and there.

src/win/win_about.c

@@ -8,7 +8,7 @@
  *
  *		Handle the About dialog.
  *
- * Version:	@(#)win_about.c	1.0.1	2017/10/07
+ * Version:	@(#)win_about.c	1.0.2	2017/10/09
  *
  * Authors:	Sarah Walker, <http://pcem-emulator.co.uk/>
  *		Miran Grca, <mgrca8@gmail.com>
@@ -29,7 +29,6 @@
 #include <stdlib.h>
 #include <wchar.h>
 #include "../86box.h"
-#include "../ibm.h"
 #include "win.h"