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Source: https://github.com/ipfs/go-ipfs/commit/2884c8434350538339bef4e9e2e4da8657548e3e

will be removed from implementations by and by

This reverts commit 7a7de7ec.

- made Response.Request() return Request not *Request
- added ResponseEmitter.Tee()
- added a wrapper that wraps a Response and provides an oldcmds.Response

this way we can share the code with the legace commands package and don't have to convert everything