[PyQt] Pickle Support

[Phil Thompson]

The current SIP snapshot now supports the provision of handwritten code for 
pickling wrapped classes. It also automatically pickles enums. It does not 
have the usual pickle restriction of not being able to pickle nested types.

The current PyQt4 snapshot has pickle support for the following classes...

QByteArray, QChar, QColor, QDate, QDateTime, QKeySequence, QLatin1Char, 
QLatin1String, QLine, QLineF, QMatrix, QPoint, QPointF, QPolygon, QRect, 
QRectF, QSize, QSizeF, QString, QTime

Phil