Commit::CommitIsAncestor & Ref::FindRefName RPC design

Conversation: #221 and #308

Requires: #66 (closed)

RPC Design

Projects::MergeRequestsController#ci_status.json
Projects::MergeRequestsController#ci_environments_status.json

• Create RPC protobuf definitions based on analysis from #65 (closed)
• Create and publish Ruby client
• Create Golang client

mentioned in issue #86 (closed)

mentioned in issue #87 (closed)

added Doing label

mentioned in merge request gitaly-proto!1 (merged)

closed via commit gitaly-proto@1d4fb881

mentioned in issue #221

mentioned in issue #308

changed title from Projects::MergeRequestsController#ci_status.json / Projects::MergeRequestsController#ci_environments_status.json RPC design to Commit::CommitIsAncestor & Ref::FindRefName RPC design

changed the description