Boto-rsync

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* Fixed an issue where the contents of local directories didn't get copied into
remote directories if the remote directory existed and was empty.

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* Added the `--anon` option.
* Added the `-m/--metadata` option.
* Switched from getopt to argparse for argument parsing.
* Changed `boto` dependency to >=2.2.1 (required for the `--anon` option).

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* Added the `--glob` option.
* Added the `--endpoint` option.
* Long form options were renamed from `--long_name` to `--long-name`.
* Made the creation of remote "directory keys" the default behavior and added
the `--skip-dirkeys` option.
* Fixed issue with `--long-option` arguments not being parsed correctly.

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* Added the `--no_recurse` option.
* Fixed an issue where output on Windows was improperly formatted.

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* Added info on boto's advanced configuration options.
* Fixed boto's version requirement. The "encrypt_key" option requires boto v2.1
or greater.
* Fixed issues with PyPI.
* Fixed/updated setup script.

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* Added initial support for Google Storage.