Planned support for new Kafka 0.10 message format

[makkes]

Do you already have plans on supporting the new message format of the upcoming 0.10 release? We're especially interested in using the new timestamps introduced with https://cwiki.apache.org/confluence/display/KAFKA/KIP-32+-+Add+timestamps+to+Kafka+message.

Thanks!

[wvanbergen]

No plans as of yet, but we're always interested in contributions.

This may require #617 to be in place first, so we can continue to support older Kafka versions as well. @eapache what do you think?

[eapache]

There are two pieces here:

• on-the-wire protocol message support, which we can add at any time and won't conflict with anything
• ability to actually use the new messages in the producer/consumer which depends on User-space multi-version support #617 to really do properly

Pull requests welcome. I'll probably get around to it eventually otherwise, but it's very low on our list of priorities right now.

[eapache]

Support for targeting various kafka versions properly was done in #673 and #676. Support for producer timestamps was done in #678.