v2.0.0

Added

• storage:schemes, storage:refs and Storage Scheme Object
• Support the storage extension in Links
• Support for the Alternate Assets Extension
• Support for other storage providers, including custom S3 hosts

Changed

• The extension is a framework for storage providers, it doesn't strictly define the individual providers.
• The storage providers are grouped in storage:schemes and located in the Item Properties, Collections or Catalog metadata
• Assets and Links reference the storage schemes by key in storage:refs

Removed

• storage:platform, storage:region, storage:requester_pays and storage:tier
  (moved to Storage Scheme Object, except for the tier)