api,server: slice are already refs, no need to return ptr
Bump version to 0.4.7
* Hack: change builder tests to always use the current unit test image, instead of hardcoding 'docker-ut'
Merge pull request #1065 from dotcloud/bump_0.4.7

Bump version to 0.4.7
Documented release process for maintainers in hack/RELEASE.md
Merge pull request #1061 from proppy/fix-slices-ref

api,server: slice are already refs, no need to return ptr
fix status code in doc
Merge pull request #1085 from dotcloud/1076-doc_delete-fix

fix status code in doc
Pushing an Image causes the docker client to give an error message instead of
writing out streamed status.

This is caused by a Buffering message that is not in the correct json format:

[...]
{"status"
:"Pushing 6bba11a28f1ca247de9a47071355ce5923a45b8fea3182389f992f4
24b93edae"}Buffering to disk 244/? (n/a)..
{"status":"Pushing",[...]

The "Buffering to disk" message is originated in
srv.runtime.graph.TempLayerArchive

I am now using the StreamFormatter provided by the context from which the
method is called.