Bugfixes
--------
- GStreamer decoder clamped to 16bit sample width, since the default OpenAL backend on Linux does
not support anything higher.
Improvements
------------
- shapes module: added `Circle.rotation` property and blending to standalone shape `draw` methods.
- shapes module: added missing `delete` and `__del__` methods.
- The ImageMouseCursor has a new `accelerated` parameter to allow custom mouse points to be drawn
natively on Windows and Linux.