Add Qt4 windowport

Originally by Ray Chason for 3.4.3, based on the Qt windowport by
Warwick Allison. The look and feel is mostly the same.

Some improvements over the Qt 3 interface are:

* Panes are resizable
* Full support for IBMgraphics, and walls and corridors are drawn with
  graphical primitives for a continuous appearance no matter what the font
  says
* Lots of irritating glitches fixed
* Menus support proportional fonts correctly

Adding this because the old Qt windowport cannot be compiled on Qt4,
even with Qt3 compatibility stuff.

TODO:
 - background map glyphs
 - status hilites
 - menucolors

win/Qt4/qt4streq.h

@@ -0,0 +1,30 @@
+// Copyright (c) Warwick Allison, 1999.
+// Qt4 conversion copyright (c) Ray Chason, 2012-2014.
+// NetHack may be freely redistributed.  See license for details.
+
+// qt4streq.h -- string requestor
+
+#ifndef QT4STREQ_H
+#define QT4STREQ_H
+
+#include "qt4line.h"
+
+namespace nethack_qt4 {
+
+class NetHackQtStringRequestor : QDialog {
+private:
+	QLabel prompt;
+	NetHackQtLineEdit input;
+	QPushButton* okay;
+	QPushButton* cancel;
+
+public:
+	NetHackQtStringRequestor(QWidget *parent, const char* p,const char* cancelstr="Cancel");
+	void SetDefault(const char*);
+	bool Get(char* buffer, int maxchar=80);
+	virtual void resizeEvent(QResizeEvent*);
+};
+
+} // namespace nethack_qt4
+
+#endif