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Previously we had a confusing situation, with:

* single-arg doc: published name <name> to <value>
* double-arg doc: published name <value> to <name>
* implementation: Published name <name> to <value>

Now we have the uniform:

  Published to <name>: <value>

With the following goals:

1. It's clear that we're writing <value> to <name>'s IPNS slot in the
   DHT.
2. We preserve the order of arguments from the command-line
   invocation:

     $ ipfs name publish <name> <value>
     Published to <name>: <value>