Allow IFComp games to continue to be playable after the comp

[dfabulich]

When the competition ends, the IFComp web player goes away, which always catches authors by surprise. It would be better to continue to host the games online, allowing authors to continue to push post-comp updates without having to switch to an entirely different system like itch.io or borogove.io.

I speculate that the optimal way to do that would be to integrate IFComp with borogove.io. Authors would/could upload their games to borogove.io unlisted during beta testing, then we could have a way to publish borogove games when the competition starts, and link to those games from the ballot.

[andrewschultz]

As an author, I don't know if we want to continue allowing post-comp updates. I think having 6 weeks to make major fixes is enough, and I think we'd like some historical accuracy if some game undergoes significant post-comp changes. If an author is that ambitious, we should deploy stuff on our own platforms.

However, letting people play the final-bugfixed versions, or at least be able to download them, would be nice.

This may be more in the realm of "what IFComp should submit to IFArchive," though.