Account for existing objects in bucket when using storage.bucket.Bucket.upload_file #162
Description
From TODO:
# TODO: What do we do about overwriting data?See storage.bucket.Bucket.upload_file for relevant code and #146 for some context.
git blame output
b7f1b774 (JJ Geewax 2014-01-29 18:02:29 -0500 201) # TODO: What do we do about overwriting data?