Changes from 0.2.0 to 0.2.1

• Optimizations directed by using python's profile module. If the widget was too slow on your computer before, please try this version.
• A new test script 'test_context.py' uses the piemenu as a context menu for a list widget.

Known bugs

• In Qt 2.3 on Linux; keyboard control and clicking outside menu to close it are not working.
• Show all tooltips (pressing F1) does not display correctly in Qt 2.3 on Windows.