With this release, we have made good progress on passing the node conformance tests.

Highlights of the release:

1. Logging support
2. 115/121 (95%) node conformance tests pass (#441)
3. gpg check on image pull
4. Lots of bug fixes
5. Supports latest runc v1.0.0-rc3 and runtime-spec v1.0.0-rc5

Features that don't work yet:
Streaming (exec), attach and port forward.