Modify methods get_bulk_metadata of classes BulkGetMetadataGoogleStore, BulkGetMetadataAmazonStore, and BulkGetMetadataWebdavStore, to add retry decorator for error handling
Modify class TinyDAVClient, to get filename in error message for exceptions in method upload
Modify setup.py, to remove boto requirement, which is already included in gsutil
Modify setup.py, to remove unnecessary imports
Update CHANGELOG with new version
Update setup.py with new version