https://github.com/opencontainers/specs/milestones/v0.4.0

Breaking changes:

* config: Single, unified config file, opencontainers#284
* config: cwd is a required default, and must be absolute, opencontainers#286,
  opencontainers#307, opencontainers#308, opencontainers#312
* config: qualify the name of the version field, opencontainers#309
* config-linux: Convert classID from hex to uint32, opencontainers#296
* config-linux: Separate mknod from cgroups, opencontainers#298

Additions:

* config-linux: Add NoNewPrivileges setting for linux, opencontainers#290

Minor fixes and documentation:

* config-linux: clarify oom_score_adj, opencontainers#236, opencontainers#292
* config-linux: Update links to cgroups documentation, opencontainers#318
* config-linux: Remove pointers for slices preferring omitempty
  tag instead, opencontainers#316
* README: add runtime, bundle, and hook author user, opencontainers#280
* ROADMAP: reshuffled and split into GitHub issues, opencontainers#300, opencontainers#301,
  opencontainers#304, opencontainers#306
* style: Collect established styles in a discoverable location, opencontainers#287, opencontainers#311

Reminder: During the 0.x series of OCI releases we make no backwards

compatibility guarantees and intend to break the schema during this series.

An initial draft release, marking the milestone towards a stable 1.0.0

Reminder: During the 0.x series of OCI releases we make no backwards
compatibility guarantees and intend to break the schema during this series.