Import window when gl is imported -- this is still needed for test cases that import gl and not window.
Import window when gl is imported -- this is still needed for test cases that
import gl and not window.

gdkar/pyglet,cledio66/pyglet,odyaka341/pyglet,xshotD/pyglet,Alwnikrotikz/pyglet,qbektrix/pyglet,odyaka341/pyglet,gdkar/pyglet,cledio66/pyglet,mpasternak/michaldtz-fixes-518-522,kmonsoor/pyglet,cledio66/pyglet,arifgursel/pyglet,Alwnikrotikz/pyglet,kmonsoor/pyglet,gdkar/pyglet,xshotD/pyglet,cledio66/pyglet,google-code-export/pyglet,Alwnikrotikz/pyglet,shaileshgoogler/pyglet,gdkar/pyglet,google-code-export/pyglet,arifgursel/pyglet,mpasternak/michaldtz-fix-552,qbektrix/pyglet,arifgursel/pyglet,kmonsoor/pyglet,google-code-export/pyglet,mpasternak/michaldtz-fix-552,google-code-export/pyglet,mpasternak/pyglet-fix-issue-518-522,mpasternak/pyglet-fix-issue-552,mpasternak/michaldtz-fixes-518-522,cledio66/pyglet,odyaka341/pyglet,mpasternak/michaldtz-fixes-518-522,mpasternak/pyglet-fix-issue-518-522,qbektrix/pyglet,mpasternak/pyglet-fix-issue-518-522,shaileshgoogler/pyglet,mpasternak/michaldtz-fix-552,shaileshgoogler/pyglet,mpasternak/pyglet-fix-issue-552,Alwnikrotikz/pyglet,xshotD/pyglet,xshotD/pyglet,xshotD/pyglet,Austin503/pyglet,shaileshgoogler/pyglet,arifgursel/pyglet,mpasternak/pyglet-fix-issue-552,google-code-export/pyglet,shaileshgoogler/pyglet,kmonsoor/pyglet,odyaka341/pyglet,Austin503/pyglet,qbektrix/pyglet,odyaka341/pyglet,mpasternak/michaldtz-fix-552,mpasternak/pyglet-fix-issue-518-522,Alwnikrotikz/pyglet,gdkar/pyglet,Austin503/pyglet,qbektrix/pyglet,kmonsoor/pyglet,Austin503/pyglet,mpasternak/michaldtz-fixes-518-522,arifgursel/pyglet,mpasternak/pyglet-fix-issue-552,Austin503/pyglet