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/model/SourceCode.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2009, Ingo Weinhold, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef SOURCE_CODE_H
+#define SOURCE_CODE_H
+
+
+#include <Referenceable.h>
+
+#include "LineDataSource.h"
+#include "TargetAddressRange.h"
+
+
+class LocatableFile;
+class SourceLanguage;
+class SourceLocation;
+class Statement;
+
+
+class SourceCode : public LineDataSource {
+public:
+	virtual						~SourceCode();
+
+	// Locking needed for GetStatementLocationRange(), since that might use
+	// mutable data.
+	virtual	bool				Lock() = 0;
+	virtual	void				Unlock() = 0;
+
+	virtual	SourceLanguage*		GetSourceLanguage() const = 0;
+
+	virtual	bool				GetStatementLocationRange(
+									const SourceLocation& location,
+									SourceLocation& _start,
+									SourceLocation& _end) const = 0;
+
+	virtual	LocatableFile*		GetSourceFile() const = 0;
+};
+
+
+#endif	// SOURCE_CODE_H