Merge pull request #2 from guardian/hg-s3-download

S3 List contents and delete etc.
Merge pull request #3 from guardian/hg-s3-download

S3 must be a class
Merge pull request #4 from guardian/hg-s3-download

Make sure draft is draft and live is live etc.
Merge pull request #5 from guardian/hg-s3-download

Delete snapshots
Handle the new format correctly