freedoom/attic: Old Freedoom resources never die, they just get put in the attic

镜像自地址 https://github.com/freedoom/attic

Georgy Samoilov a306d1bc59 Add CREDITS-MUSIC, squash		6 月之前
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ykeya0.png	a306d1bc59 Add CREDITS-MUSIC, squash	6 月之前
ykeyb0.png	a306d1bc59 Add CREDITS-MUSIC, squash	6 月之前
yskua0.png	a306d1bc59 Add CREDITS-MUSIC, squash	6 月之前
yskub0.png	a306d1bc59 Add CREDITS-MUSIC, squash	6 月之前