Update links and information on PyQt/PyKDE.

Doc/lib/tkinter.tex

@@ -1789,12 +1789,19 @@ wxWindows is much richer in widgets than \refmodule{Tkinter}, with its
 help system, sophisticated HTML and image viewers, and other
 specialized widgets, extensive documentation, and printing capabilities.
 }
-\seetitle[http://www.thekompany.com]{PyKDE}{
-PyKDE is a SIP wrapped interface to the Qt toolkit.
-The Qt \Cpp{} toolkit lies at the heart of the KDE desktop, and the
-Qt toolkit allows very tight integration with KDE, and also Windows
-portability. SIP is a tool for generating bindings for \Cpp{} libraries
-as Python classes, and is specifically designed for Python.
+\seetitle[]{PyQt}{
+PyQt is a \program{sip}-wrapped binding to the Qt toolkit.  Qt is an
+extensive \Cpp{} GUI toolkit that is available for \UNIX, Windows and
+Mac OS X.  \program{sip} is a tool for generating bindings for \Cpp{}
+libraries as Python classes, and is specifically designed for Python.
+An online manual is available at
+\url{http://www.opendocspublishing.com/pyqt/} (errata are located at
+\url{http://www.valdyas.org/python/book.html}). 
+}
+\seetitle[http://www.riverbankcomputing.co.uk/pykde/index.php]{PyKDE}{
+PyKDE is a \program{sip}-wrapped interface to the KDE desktop
+libraries.  KDE is a desktop environment for \UNIX{} computers; the
+graphical components are based on Qt.
 }
 \seetitle[http://fxpy.sourceforge.net/]{FXPy}{
 is a Python extension module which provides an interface to the