GoSublime 'on save' package import order changes
Updated Get Image Json not to worry about errors
Update Put Image Json as per docker-registry 0.9.0

* Removed checksum storing
* Cleanup old checksum if any
Added function DockerVersion to get docker version
Updated Put Image Layer as per docker registry 0.9.0
Updated StoreCheckSum to store checksums in string array
Updated Put ImageChecksum as per docker registry 0.9.0

* Method loadChecksums to get checksums in string array
* Method stringInSlice checks checksum within in checksums
Checksum as per docker version in Get Image Json
Sending checksum(s) in json format in Get Image Json
Handled error handling at appropriate places
Added missing API Get Repo Tags Json
Merge remote-tracking branch 'budhrg/go-docker-registry-0.9.0' into go-docker-registry-0.9.0
Updated Put Repo Tag as per docker-registry 0.9.0

* Updated create repo json to check 'docker' for docker version
  since user-agent contains 'docker' instead of 'docker_version'