[PyQt] ANN: PyQt v5.4.1 Released

[Phil Thompson]

PyQt v5.4.1 has been released. This is a minor functional and bug-fix 
release.

- Added support for Qt v5.4.1.
- Added the QMacCocoaViewContainer class.
- All OpenGL examples use QOpenGLWidget and no longer require PyOpenGL.
- Added initial implementations of _QOpenGLFunctions_2_1 and 
_QOpenGLFunctions_4_1_Core.
- QEvent.None is now QEvent.None_.
- Added missing QEvent.Type members that are now documented in Qt.
- Added the --license-dir option to configure.py.
- Installing into a virtual env should now work.
- pyuic5 and pyrcc5 no longer include a timestamp in the generated code.

Phil