Version 1.6.5

Version 1.6.0

Version 1.5.0

Version 1.4.0

Version 1.3.0

Version 1.2.0

Adds support for App Engine second-generation runtimes.

Version 1.1.0

README: clarify blobstore deprecation message

Not all of the blobstore package is deprecated: some features (like
uploading) are still supported and do not require direct GCS usage.

Also update the the URL for the storage veneer.

Change-Id: Ic5205e83bae7d315cd46550f4bd09d0a895c4bf8