Adds logging and semantic changes.
Changes S3 structure. Adds new file fetching and pushing methods.
Adds forgotten file, makes some tests pass.
Creates a directory structure for even more overlap
File manifests are now returned as the current versions with a key 'versions' containing mappings to the older versions. Note: versions may not exist.
More structure changes.
Fixes test_archival
Fixes a s3 test
Removes unused URL