v0.3.0

Deprecations:

• NodeGetId, in favor of NodeGetInfo; will be removed by v1.0

Additions:

• spec: snapshot API (new Controller capability)
• spec: topology API (new Plugin capability)
• spec: ProbeResponse reports readiness
• spec: NodeGetInfo RPC supersedes NodeGetId RPC
• spec: NodeGetInfo reports volume limits (new Node capability)
• readme: added CSI adoption section
• make: add DNE comment to generated protobufs
• lib/go: initial support for protobuf "well known types"

Clarifications/Corrections/Fixes:

• spec: gGRPC error code corrections
• spec: remove a reference to VolumeInfo
• spec: consistency fix on map declarations
• spec: use MUST when describing CapacityRange field reqs
• spec: consistently document intentionally empty messages
• spec: clarify field requirements
• spec: add units for GetCapacityResponse
• spec: fix SnapshotSource commment
• spec: clarification re: Volume from snapshot with different size
• spec: fix spelling and grammatical errors
• spec: remove trailing spaces
• contrib: clarify authoring process, spec.md is system-of-record
• make: transitively clean/clobber generated go bindings

Dependencies:

• travis: bump golang version to 1.9.5
• lib/go: pin golang/protobuf dependency to v1.1.0