Debugger: Split into core library and application.

- Add subfolder src/kits/debugger which contains the debugger's core
  functionality and lower layers. Correspondingly add headers/private/debugger
  for shared headers to be used by clients such as the Debugger application
  and eventual remote_debug_server. Adjust various files to account for
  differences as a result of the split and moves.
- Add libdebugger.so to minimal Jamfile.

headers/private/debugger/debug_info/ImageDebugInfoProvider.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2009, Ingo Weinhold, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef IMAGE_DEBUG_INFO_PROVIDER_H
+#define IMAGE_DEBUG_INFO_PROVIDER_H
+
+#include <SupportDefs.h>
+
+
+class Image;
+class ImageDebugInfo;
+
+
+class ImageDebugInfoProvider {
+public:
+	virtual						~ImageDebugInfoProvider();
+
+	virtual	status_t			GetImageDebugInfo(Image* image,
+									ImageDebugInfo*& _info) = 0;
+										// returns a reference
+};
+
+
+#endif	// IMAGE_DEBUG_INFO_PROVIDER_H