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/source_language/SourceLanguage.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2009, Ingo Weinhold, [email protected].
+ * Copyright 2014, Rene Gollent, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef SOURCE_LANGUAGE_H
+#define SOURCE_LANGUAGE_H
+
+
+#include <Referenceable.h>
+
+
+class BString;
+class ExpressionResult;
+class SyntaxHighlighter;
+class TeamTypeInformation;
+class Type;
+class ValueNode;
+class ValueNodeManager;
+
+
+class SourceLanguage : public BReferenceable {
+public:
+	virtual						~SourceLanguage();
+
+	virtual	const char*			Name() const = 0;
+
+	virtual	SyntaxHighlighter*	GetSyntaxHighlighter() const;
+									// returns a reference,
+									// may return NULL, if not available
+
+	virtual	status_t			EvaluateExpression(const BString& expression,
+									ValueNodeManager* manager,
+									TeamTypeInformation* info,
+									ExpressionResult*& _output,
+									ValueNode*& _neededNode);
+};
+
+
+#endif	// SOURCE_LANGUAGE_H