Vendor containers/image from mtrmac/image:dockerd-verification

Update dependencies to allow it to build.  Also drop k8s and
dependencies now that we do not import all containers/image transports.

WARNING: This DOES NOT BUILD because it references sirupsen/logrus, not
Sirupsen/logrus.

Author: mtrmac

hack/vendor.sh

@@ -168,10 +168,8 @@ clone git github.com/inconshreveable/mousetrap 76626ae9c91c4f2a10f34cad8ce83ea42
 clone git github.com/flynn-archive/go-shlex 3f9db97f856818214da2e1057f8ad84803971cff
 
 # signatures
-clone git github.com/containers/image e6ced5e26c9b60ec23f0f7bd49b82a106f1d4db4
+clone git github.com/containers/image dockerd-verification https://github.com/mtrmac/image.git
 clone git github.com/opencontainers/image-spec v1.0.0
-clone git k8s.io/kubernetes 4a3f9c5b19c7ff804cbc1bf37a15c044ca5d2353 https://github.com/openshift/kubernetes
-clone git github.com/golang/glog 44145f04b68cf362d9c4df2182967c2275eaefed
 clone git github.com/ghodss/yaml 73d445a93680fa1a78ae23a5839bad48f32ba1ee
 clone git gopkg.in/yaml.v2 d466437aa4adc35830964cffc5b5f262c63ddcb4
 clone git github.com/mtrmac/gpgme master