renamed appkit backend to cocoa and got something that compiles

include/Mw/LowLevel/Cocoa.h

@@ -0,0 +1,28 @@
+/*!
+ * @file Mw/LowLevel/Cocoa.h
+ * @brief Work in progress Cocoa Backend
+ * @warning This is used internally.
+ */
+#ifndef __MW_LOWLEVEL_COCOA_H__
+#define __MW_LOWLEVEL_COCOA_H__
+
+#include <Mw/LowLevel.h>
+#include <Mw/MachDep.h>
+#include <Mw/TypeDefs.h>
+
+MWDECL int MwLLCocoaCallInit(void);
+
+struct _MwLLCocoa {
+	struct _MwLLCommon common;
+	void*		   real;
+};
+
+struct _MwLLCocoaColor {
+	struct _MwLLCommonColor common;
+};
+
+struct _MwLLCocoaPixmap {
+	struct _MwLLCommonPixmap common;
+};
+
+#endif