Fixed bugs that were preventing NVR and Flash files from behind saved;

A lot of clean ups from waltje;
Start of a directory structure for the code, thanks to waltje.

src/headland.c

@@ -2,9 +2,9 @@
    see COPYING for more details
 */
 #include "ibm.h"
+#include "cpu/cpu.h"
 #include "io.h"
 #include "mem.h"
-#include "cpu.h"
 
 #include "headland.h"