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

commands: Return a reader in a Response#Reader method, instead of making Response implementing io.Reader