Move all include files to src/include

- 86Box's own headers go to /86box
- munt's public interface goes to /mt32emu
- all slirp headers go to /slirp (might want to consider using only its public inteface)
- single file headers from other projects go in include root

src/disk/hdc_ide.c

@@ -28,24 +28,24 @@
 #include <inttypes.h>
 #include <wchar.h>
 #define HAVE_STDARG_H
-#include "86box.h"
+#include <86box/86box.h>
 #include "cpu.h"
-#include "machine.h"
-#include "86box_io.h"
-#include "mem.h"
-#include "pic.h"
-#include "pci.h"
-#include "rom.h"
-#include "timer.h"
-#include "device.h"
-#include "scsi_device.h"
-#include "cdrom.h"
-#include "plat.h"
-#include "ui.h"
-#include "hdc.h"
-#include "hdc_ide.h"
-#include "hdd.h"
-#include "zip.h"
+#include <86box/machine.h>
+#include <86box/io.h>
+#include <86box/mem.h>
+#include <86box/pic.h>
+#include <86box/pci.h>
+#include <86box/rom.h>
+#include <86box/timer.h>
+#include <86box/device.h>
+#include <86box/scsi_device.h>
+#include <86box/cdrom.h>
+#include <86box/plat.h>
+#include <86box/ui.h>
+#include <86box/hdc.h>
+#include <86box/hdc_ide.h>
+#include <86box/hdd.h>
+#include <86box/zip.h>
 
 
 /* Bits of 'atastat' */