Stream post_file (#34)

* Implement HTTP body streaming version of post_file.

* Refactor streaming interface format. Fix tests.

* Reduce number of files created in test by increasing chunk size to 1MB.

* Fix check catalog_exists test. Cleanup unused libraries.

* Log node public key in config. Correct Error Message in fs backend. Refactor file_stream to use explicit FileStream type alias (#35)

* Update carbonado to 0.3.0-rc.7 and secp256k1 to 0.27.0. Fix misnamed variable in tests.

* Add drive_redundancy option to config.

* Update directories crate. Default volume directory is now the Carbonado folder in the home directory. Configurable drive redundancy.

* Fixes in response to review items.

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Co-authored-by: Wesley Parr <[email protected]>