Fix gallery to find images with absolute URLs.
Fix gallery to find images with absolute URLs.

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