First draft of a BCO to markdown schema

Write a first draft of a schema for exporting a BCO to markdown (use the GitHub flavor of markdown).
E.g. "object_id" and "name" (from Provenance Domain) can be H1, top level domains can be H2, steps can be a numbered list, etc.

# My Example BCO
## BCO_123456
## Usability Domain
This is a spectacular pipeline for doing cool things.

## Provenance Domain

| Field | Value |
|---------|-----|
| Version | 1.0 |
| License | https://opensource.org/license/mit|
| Created | 2020-10-24T17:14:10.212Z |

## Description Domain
#### Steps
1. Download the data
* www.example.com
2. Preprocess it
* www.example.com