Issue 353: xlib key symbol mismatch when shift key held.
Issue 353: xlib key symbol mismatch when shift key held.

seeminglee/pyglet64,niklaskorz/pyglet,seeminglee/pyglet64,niklaskorz/pyglet,adamlwgriffiths/Pyglet,adamlwgriffiths/Pyglet,niklaskorz/pyglet,seeminglee/pyglet64,adamlwgriffiths/Pyglet,adamlwgriffiths/Pyglet,niklaskorz/pyglet