Production Release

This is the first production release of this tool, with the following new features:

• custom exceptions and better error handling
• "batch-deposit" mode for orchestrating a series of deposits with a batch manifest CSV
• a larger default chunk size and better memory management in reading chunks
• use line-oriented JSON for per-batch rather than per-file logs
• more reliable relative path calculation

Beta release

This release adds the following features:

1. writes json responses from AWS into a file in a specified log directory
2. if specified, writes a mapfile summarizing the batch results

Alpha release

This release is a proof of concept with the following features:

1. Multi-part, threaded upload of large files
2. Local calculation of etags for verification of large deposits
3. Batch configuration with command-line arguments
4. Selection of alternate AWS profiles
5. Deposit of single files or batches defined by md5sum output text files (md5, path)