Is there any reason for some of these structs not to implement Copy?

[AhoyISki]

I saw that some of the structs that are part of the Record didn't implement the Copy trait. Is there any reason for this? If there is, I guess you can ignore this pull request, but in my use case, it would be kind of useful to be able to copy a Record, especially considering that nothing inside of a Record precludes it from implementing Copy, since it's all just references inside.

[KodrAus]

Thanks for the PR @AhoyISki. The main reason we haven't done this already would just be because it's a major API commitment that we wouldn't ever be able to back out of, and since the Log trait takes records by reference, there isn't a need in log's own API to copy records.

[AhoyISki]

That's understandable, I guess.