Enable OAuth 2.0 when using Google Cloud Storage as a Storage for
docker-registry.
rm self.
add oauth2 option to the config, merge both gcs flavors together.
Disable pyflake unused import warning
Fix typo in `docker run` statement in README
Switch to using gcloud util.
Update the doc
Fix remove operation bug. Add some warning logs.
Merge pull request #288 from TheDude05/fix-docker-run-typo

Fix typo in `docker run` statement in README
Merge remote-tracking branch 'upstream/master'

Conflicts:
	config/config_sample.yml
Enable OAuth 2.0 when using Google Cloud Storage as a Storage for
docker-registry.
rm self.
add oauth2 option to the config, merge both gcs flavors together.
Disable pyflake unused import warning
Switch to using gcloud util.
Update the doc
Merge branch 'master' of https://github.com/ktintc/docker-registry

Conflicts:
	config/config_sample.yml
tabs
Merge pull request #269 from ktintc/master

Enable OAuth 2.0 when using Google Cloud Storage
Configuring the secret_key should be done on the app object (does not change the behavior)

Docker-DCO-1.1-Signed-off-by: Sam Alba <sam.alba@gmail.com> (github: samalba)