GitLab

__Major Revisions__

* Refine document structure for user tutorial.

__Minor Revisions__

* Add AMD part in installation.
* Change default config file to latest link.

Add docs on:
* Docker image tag list
* Build image and run container instructions

Support `--host-list` for deploy and run commands.

Before this change, an inventory file is needed to use `sb deploy/run`.
Now, `--host-list localhost` or `-l localhost` is sufficient for quick try.

* Support custom output directory.
* Update document.

Update SuperBench documents.