Packaging, issue #1174: Add pure binary to docker release
improve mergeconfig, if dns, portspec, env or volumes specify in docker run, apend and not replace
packaging, issue #1176: Document PPA release step
Merge pull request #1188 from dotcloud/1174-packaging-binary

Packaging: add pure binary to docker release
Merge pull request #1184 from dotcloud/1176-packaging-release

Hack: document PPA release step
Merge pull request #1210 from dotcloud/improve_configmerge

improve mergeconfig, ...
Hotfix: make sure ./utils tests pass