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.
Mount /dev/shm as a tmpfs.

Fixes #1122.
Typo fix

Error message grammar tweak
Style fixes for fmt + err usage.

fmt.Printf and friends will automatically format using the error
interface (.Error()) preferentially; no need to do err.Error().
Fix error in rmi when conflict
Merge pull request #1126 from karanlyons/patch-1

* Runtime: Mount /dev/shm as a tmpfs.
Merge pull request #1129 from cespare/style-fixes-2

Style fixes for fmt + err usage.
Revert #1126. Remove mount shm
Merge pull request #1127 from cespare/patch-1

Typo fix
Adding support for nicer URLs to support standalone registry (+ some registry code cleaning)
Merging from master
Restoring old changeset lost by previous merge
Allowing namespaces in standalone registry
Fixed ping URL
fmt.Errorf instead of errors.New
Code cleaning
Merge pull request #1144 from dotcloud/standalone_registry

* Registry: Standalone registry
Fixed runtime_test (ImagePull prototyped changed)