Release Kubernetes v0.2

This commit will be tagged with a v0.2 annotated git tag.

Tested:
- Created a git tag for it, built it and checked output of -version:

    $ git tag -a -m 'Release Kubernetes v0.2' v0.2

    $ make
    hack/build-go.sh
    Building local go components

    $ _output/go/bin/kubecfg -version
    Kubernetes version 0.2, build b47f9af5c9ea770973be1b001adaffbdfcb08618

    $ _output/go/bin/kubecfg -version=raw
    version.Info{Major:"0", Minor:"2", GitVersion:"v0.2", GitCommit:"b47f9af5c9ea770973be1b001adaffbdfcb08618", GitTreeState:"clean"}

- Made sure hack/test-go.sh and hack/test-cmd.sh still pass.

Fixes: Issue #1018

Signed-off-by: Filipe Brandenburger <filbranden@google.com>
Merge pull request #1219 from filbranden/release_v0.2

Release Kubernetes v0.2