🎉 v2.0.0 Huge Rewrite

[sa7mon]

This is almost a complete re-write of the tool and thus deserves a major version bump.

Changes

• Check for each combination of open permissions on buckets
• Check for "dangerous" permissions: Write, WriteACP
• Simplified the output not have different formats for file and console output. Everything is now just output to stdout in a uniform way to allow easy parsing with grep/awk/etc
• Supported added for non-AWS S3-compatible APIs. This was done in a generic way to avoid having to include API-specific code in the tool and update it when the APIs inevitably change/break
• Packaged and uploaded a Pip package for easier distribution
• Built and pushed a Docker image to Docker Hub: https://hub.docker.com/r/hothamandcheese/s3scanner
• Increased overall test coverage to ~90%
• Added support for multi-threaded scanning and dumping
• Added support for "resume-able" dumping. If an object has already been downloaded, it will be skipped unless the sizes differ
• Supports Windows/MacOS/Linux with Python 3.6+

Known Issues / Future Work

• Currently, non-AWS endpoints are only scanned for anonymous permissions. Testing is needed to see if credential scans work and if the permissions match AWS structure.
• When dumping a bucket, the tool will check to see if each file has already been downloaded. If it has, the file will be skipped unless the size of the local and remote files don't match. In the future, the user should be given a choice to re-download these files.
• Measure user desire for other output formats (i.e. csv/json/sqlite)

Closes #16
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