File-syncer

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* Rename ``--no-content-type`` option to ``--auto-content-type``.

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* Allow user to specify ``--no-content-type`` option. If this option is
specified, program won't automatically send ``application/octet-stream``
Content-Type header with each file, but it will use automatic content
type detection from the underlying Libcloud library. (9)
[Alex Meng]

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* Allow user to specify a ``--region`` option for the provider drivers which
support multiple regions. (8)
[Samuel Toriel]

* Bump minimum version for Libcloud dependency to 0.13.0.

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* Create a local directory hierarchy if it doesn't exist when using a restore
option. (7)
[Ryan Philips]

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* Fix a bug with supported providers.

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* Add support for retries to all the remote operations. (4)
[Ryan Philips]