Added ValueViewer,DataViewer,CardViewer and made related changes

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@49 0fc631ac-6414-0410-93d0-97cfa31319b6

src/data/stylesheet.hpp

@@ -20,6 +20,8 @@ DECLARE_POINTER_TYPE(Game);
 class StyleSheet : public Packaged {
   public:
 	GameP game;
+	double card_width;		///< The width of a card in pixels
+	double card_height;		///< The height of a card in pixels
 	
 	static String typeNameStatic();
 	virtual String typeName() const;