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/files/LocatableFile.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2009, Ingo Weinhold, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef LOCATABLE_FILE_H
+#define LOCATABLE_FILE_H
+
+#include <ObjectList.h>
+
+#include "LocatableEntry.h"
+
+
+class LocatableFile : public LocatableEntry {
+public:
+	class Listener;
+
+public:
+								LocatableFile(LocatableEntryOwner* owner,
+									LocatableDirectory* directory,
+									const BString& name);
+								~LocatableFile();
+
+	virtual	const char*			Name() const;
+			void				GetPath(BString& _path) const;
+
+			// mutable (requires/does locking)
+	virtual	bool				GetLocatedPath(BString& _path) const;
+	virtual	void				SetLocatedPath(const BString& path,
+									bool implicit);
+
+			bool				AddListener(Listener* listener);
+			void				RemoveListener(Listener* listener);
+
+private:
+			typedef BObjectList<Listener> ListenerList;
+
+private:
+			void				_NotifyListeners();
+
+private:
+			BString				fName;
+			BString				fLocatedPath;
+			ListenerList		fListeners;
+};
+
+
+class LocatableFile::Listener {
+public:
+	virtual						~Listener();
+
+	virtual	void				LocatableFileChanged(LocatableFile* file) = 0;
+									// called with lock held
+};
+
+
+#endif	// LOCATABLE_FILE_H