feat(keel): add veto-related endpoints (spinnaker#898)

Revert "fix(nexus): add nexus repo names endpoint (spinnaker#890) (sp…

…innaker#903)" (spinnaker#904)

This reverts commit f4326a1.

fix(md): valid json not a string response (spinnaker#902)

feat(md): expose status of resource (spinnaker#901)

chore(history): maps not typed (spinnaker#896)

feat(cors): Configurable whitelist of origins that are allowed to mak…

…e cross-origin requests (spinnaker#891)

feat(keel): endpoints for delivery config manifests

feat(keel): reflect change in how resource history works in Keel API

chore(dependencies): Autobump korkVersion (spinnaker#886)

fix(core): Merge account list string for applications that span provi…

…ders (spinnaker#883)