Allow index array to be vbo or not.
Allow index array to be vbo or not.

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