Merge branch 'release-0.56.0' into develop

* release-0.56.0:
  Bumping version to 0.56.0
  Update signature version test suite to handle double urlencoding
  Update models to the latest versions
Properly percent encode values in URI strings

This is causing an issue with CopySnapshot when the
description has spaces in it.
Merge branch 'quote-spaces-presign' into develop

* quote-spaces-presign:
  Properly percent encode values in URI strings
Update models to the latest version
Bumping version to 0.57.0
Merge branch 'release-0.57.0'

* release-0.57.0:
  Bumping version to 0.57.0
  Update models to the latest version
  Properly percent encode values in URI strings