Added clone() function to Value.

Added support for per-card styling

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@430 0fc631ac-6414-0410-93d0-97cfa31319b6

src/data/field/text.hpp

@@ -110,6 +110,7 @@ class TextValue : public Value {
 	ValueType value;				///< The text of this value
 	Age       last_update;			///< When was the text last changed?
 	
+	virtual ValueP clone() const;
 	virtual String toString() const;
 	virtual bool update(Context&);