Display containers logs in case of build failure
Improve last log output
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.
Fix error in rmi when conflict
Merge pull request #1138 from dotcloud/1123-rmi_conflict-fix

* Runtime: Fix error in rmi when conflict
add remote addr in debug
Merge pull request #1161 from dotcloud/add_remote_addr_debug

Add remote addr in debug
Merge pull request #1030 from dotcloud/builder_display_err_log

*Builder : Display containers logs in case of build failure
Merge pull request #1066 from mhennings/fix-broken-streaming-result

* Server: Fix streaming status to the docker client while pushing images