Log Message:
update to 4.7.5
changes:
added QStringRef.__str__() and QStringRef.__unicode__() to the
 QString v1 API
the destruction by Qt of internally constructed QObject instances is now
 automatically detected
a signal defined with pyqtSignal() can now be used with methods that make
 an internal call to QObject::connect(), e.g. QTimer.singleShot()
added the --from-imports command line argument to pyuic4 and the
 from_imports argument to PyQt4.uic.compileUi()
added support for Python v3.2