Changes since 0.1.0:

• Backwards compatibility breaking changes:
  • Drop GetSupportedVersions and per RPC version fields, in favor of versioned proto packages.
  • Remove ControllerProbe and NodeProbe RPCs and replace with a new Probe RPC in the Identity service.
  • Modify names used for credentials.
  • Changed unsigned integers to signed integers in proto
  • Change ID to Id in Method names
  • Changed VolumeInfo to Volume
• Other notable changes:
  • GetPluginCapabilities added to Identity service to allow Controller service to be entirely optional.
  • Add new (optional) NodeStageVolume and NodeUnstageVolume calls