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Fix data races in #270

https://github.com/jbenet/go-ipfs/issues/270#issuecomment-61826022

https://github.com/jbenet/go-ipfs/issues/270

Swarm + Handshake Listen Addresses

feat(tour) content

The check needed knowledge of the _listen_ addresses,
not just the interface addresses. Also, the handshake now
sends out all the addresses we accumulate about ourselves.
(this may be bad in the long run, but useful now to test)

keep things in one file for now

@jbenet please review

If this is a desirable format, I will put in the rest so we can start to
make incrementatl progress on the actual copy.

Separated content from topic so Ids can be seen and modified without
excessive scrolling. Hopefully will make it easy to re-order content.

this way, ID's can be managed separately from the content

Initialize Config Version

Commands Refactor Part 1