v1.0.0-rc1

Changes with v1.0.0-rc1:
Breaking changes:

* runtime: Split create and start, #384, #450, #463, #464, #467,
  #468
* runtime: Remove exec, #388
* runtime: Enviroment MUST match the configuration, #397
* config: Runtime MUST generate errors for unsupported platforms,
  #441
* config: Windows mount destinations MUST NOT be nested, #437

Additions:

* solaris: Added platform-specific configuration, #411, #424, #431,
  #436
* runtime: Add 'annotations' and 'status' to the state structure,
  #462, #484, #485
* runtime: State no longer needs to be serialized as JSON, #446
* runtime-linux: Add /dev symbolic links, #449
* config: Allow absolute paths for root.path (which previously
  required relative paths), #394
* config-linux: Add linux.mountLabel, #393
* config-linux: Add suport for cgroup namespace, #397
* config-linux: Runtime SHOULD NOT modify ownership of any
  referenced filesystem (previously the restriction only applied to
  the root filesystem), #452
* specs-go/seccomp: Add ppc and s390x to specs-go/config.go, #475

Minor fixes and documentation:

* README: Add project.md to the Table of Contents, #376
* README: Consistenly indent the Table of Contents, #400
* README: Link to LICENSE, #442
* README: Weekly call is OCI-wide, #378
* config: Explicit runtime namespace for hooks, #415
* config: Explicit container namespace for uid, gid, and
  additionalGids, #412
* config: Fix 'string' -> 'array of strings' typo for process.args,
  #416
* runtime: The runtime MAY validate config.json, #418
* runtime: Move errors section out of operations, #445
* runtime: MAY -> SHOULD for post-stop error logging, #410
* schema/README: Document JSON Schema usage, #360, #385
* schema: Minor description updates, #456, #461
* schema/validate: Support reading documents via stdin, #482
* .pullapprove: Automate review approval, #458, #474
* .gitignore: Hide more auto-generated files, #386, #392
* .travis: git-validation detects Travis now, #366
* .travis: Regress on failure to produce docs, #479
* Makefile: Filename docs.* -> oci-runtime-spec.*, #478
* Makefile: Add install.tools target, #349
* Makefile: Allow native pandoc implementations, #428, #448
* Makefile: Prefer Bash, #455
* Makefile: Travis support for .gitvalidation, #422
* specs-go/config: Add missing omitempties for Process.Terminal,
  Root.Readonly, Spec.Linux, and Spec.Mounts, #408, #429, #430, #431
* specs-go/config: Remove incorrect omitempties for User.UID and
  User.GID, #425
* specs-go/config: Drop platform-independent comment, #451
* version: Include version in generated documentation, #406
* *: Anchor examples, #348
* *: Fix remnants from SelinuxProcessLabel to SelinuxLabel rename,
   #396
* *: Outsource code-of-conduct to TOB repository, #375, #413
* *: RFC 2119 consistency, #407, #409, #438, #444, #449
* *: Typo fixes, #390, #401
* *: Whitespace fixes and validation, #380, #381, #426
* ROADMAP: Remove stale targets, #435