Envidat-utils

Fix

- check if key exists in dest bucket, prior to transfer

Feat

- add s3 transfer function for efficient data move between buckets

Fix

- add check_file_exists function to bucket class

Fix

- add cors config allow all origins if public

Refactor

- update license with envidat

Fix

- minor feat, add clean multipart function, sort imports

Refactor

- use isort to sort all imports

Feat

- add upload and download directory functions for s3 bucket

Refactor

- update setting bucket name and api host, allow env var override if set as func var