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/include/86box/m_amstrad.h

@@ -0,0 +1,26 @@
+/*
+ * 86Box	A hypervisor and IBM PC system emulator that specializes in
+ *		running old operating systems and software designed for IBM
+ *		PC systems and compatibles from 1981 through fairly recent
+ *		system designs based on the PCI bus.
+ *
+ *		This file is part of the 86Box distribution.
+ *
+ *		Header of the emulation of the Amstrad series of PC's:
+ *		PC1512, PC1640 and PC200, including their keyboard, mouse and
+ *		video devices, as well as the PC2086 and PC3086 systems.
+ *
+ *
+ *
+ * Authors:	Sarah Walker, <http://pcem-emulator.co.uk/>
+ *
+ *		Copyright 2008-2019 Sarah Walker.
+ */
+extern int amstrad_latch;
+
+enum
+{
+    AMSTRAD_NOLATCH,
+    AMSTRAD_SW9,
+    AMSTRAD_SW10
+};