Container runtime interface
Container runtime interface

This commit includes a proposal and a Go file to re-define the container
runtime interface.

Note that this is an experimental interface and is expected to go through
multiple revisions once developers start implementing against it. As stated in
the proposal, there are also individual issues to carry discussions of
specific features.

kubernetes/community,pwittrock/community,bgrant0607/community,kubernetes/community,pwittrock/community,kubernetes/community,bgrant0607/community