Release v0.1.2-alpha

[YujiOshima]

The API of Katib is drastically changed from v0.1.1-alpha.
Though we can't update v0.2 yet, we need to release v0.1.2-alpha, update docker images and update docs.
cc @gaocegege

[gaocegege]

https://github.com/kubeflow/katib/releases/tag/v0.1.2-alpha

Version is created in GitHub, things to do are:

• Publish Docker images to DockerHub
• Update docs

[gaocegege]

@YujiOshima Could you please push the images? I think I have no permission to push to katib or kubeflow (we are using katib now).

[YujiOshima]

@gaocegege Thank you!

push the images

done!

[gaocegege]

I am closing the issue since we have:

• released the new version in GitHub and upload CLI for Linux and Darwin
• published new Docker images
• Updated the docs.