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/value/ValueFormatter.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2015, Rene Gollent, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef VALUE_FORMATTER_H
+#define VALUE_FORMATTER_H
+
+
+#include <Referenceable.h>
+
+class BString;
+class Settings;
+class Value;
+
+
+class ValueFormatter : public BReferenceable {
+public:
+	virtual						~ValueFormatter();
+
+	virtual	Settings*			GetSettings() const = 0;
+									// returns NULL, if no settings
+
+	virtual	status_t			FormatValue(Value* value, BString& _output)
+									= 0;
+
+	virtual	bool				SupportsValidation() const;
+	virtual	bool				ValidateFormattedValue(
+									const BString& input,
+									type_code type) const;
+									// checks if the passed in string
+									// would be considered a valid value
+									// according to the current format
+									// configuration and the size constraints
+									// imposed by the passed in type.
+	virtual	status_t			GetValueFromFormattedInput(
+									const BString& input, type_code type,
+									Value*& _output) const;
+									// returns reference
+};
+
+
+#endif	// VALUE_FORMATTER_H