refactor cardframe as a parent of a text card frame and a picture card frame

cardframe is now a stacked widget that prefers to show the card picture
only so that the screen can be more space efficient and the card pixel
map can be displayed as a larger size. however if the card pixel map
can not be loaded for some reason, the cardframe class will automatically
switch to the text version of the card.

a menu item was added under the database menu to allow for users to
prefer card text only.

cockatrice/src/cardinfopicture.h

@@ -0,0 +1,34 @@
+#ifndef CARDINFOPICTURE_H
+#define CARDINFOPICTURE_H
+
+#include <QLabel>
+
+class AbstractCardItem;
+class CardInfo;
+
+class CardInfoPicture : public QLabel {
+	Q_OBJECT
+
+signals:
+	void hasPictureChanged();
+
+private:
+	CardInfo *info;
+	bool noPicture;
+
+public:
+	CardInfoPicture(int maximumWidth, QWidget *parent = 0);
+	bool hasPicture() const { return !noPicture; }
+
+private:
+	void setNoPicture(bool status);
+
+public slots:
+	void setCard(CardInfo *card);
+
+private slots:
+	void updatePixmap();
+
+};
+
+#endif