Add markdown files

[loafyloaf]

This commit adds a few files to bring this repo in line with
the current publishing guidelines

[dolph]

LGTM!

For other IBM reviewers: these files should exactly match the latest versions from https://github.ibm.com/developer-journeys/journey-docs/tree/master/content/markdown_files (which no longer contain any placeholders for project names, etc, and can be distributed directly into applicable repos).

[krook]

Thanks for the contribution, but there are a couple of changes needed:

• The license should have a year and IBM, not just the bracketed placeholder text.
• Is the dWOpen Slack still to be used for discussion?

[krook]

@dolph Can you please review my comments above?