Add versioning support for rm cmd

[vadmeste]

Add versioning support of rm command

--version to specify a specific version id of an object when removing
--versions includes older versions along with objects
--rewind go back in time before removing

[harshavardhana]

The exact specification is not approved yet.

Currently:
--version to specify a specific version id of an object when removing
--versions includes versions along with objects
--rewind go back in time before removing

can we not do mc ls style for deletions? mc rm alias/bucket/object:1 ? instead of --version id?

[vadmeste]

can we not do mc ls style for deletions? mc rm alias/bucket/object:1 ? instead of --version id?

The spec is changed, now we use --version-id style and mc ls will print version ids as well.

The reason is that ':0' notation is not static and can change (:0 means the latest version, :1 means the second latest version, etc..)

[poornas]

needs updates to docs

[vadmeste]

needs updates to docs

@poornas the documentation is updated.

[poornas]

LGTM

[kannappanr]

LGTM