Merge pull request #1423 from endophage/notary_images

WIP: adding notary server and signer official images

library/notary

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+# maintainer: David Lawrence <[email protected]> (@endophage)
+
+server: git://github.com/docker/notary-official-images@3ea5b74928929415f2faaa5df574c4745bf6d286 notary-server
+server-0.2.0: git://github.com/docker/notary-official-images@3ea5b74928929415f2faaa5df574c4745bf6d286 notary-server
+signer: git://github.com/docker/notary-official-images@3ea5b74928929415f2faaa5df574c4745bf6d286 notary-signer
+signer-0.2.0: git://github.com/docker/notary-official-images@3ea5b74928929415f2faaa5df574c4745bf6d286 notary-signer