Add README content.

Author: bemosior

README.md

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-# wardley-mapping-canvas
-A repository for the Wardley Mapping Canvas
+# Wardley Mapping Canvas
+
+The Wardley Mapping Canvas helps newcomers with their first mapping experiences by offering a structure that makes mapping a step-by-step process.
+
+# License
+
+The Wardley Mapping Canvas is licensed [Creative Commons BY-SA 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/) (CC BY-SA 4.0) and incorporates concepts provided courtesy of [Simon Wardley](https://twitter.com/swardley) under the same license.
+
+# Contributing
+
+The canvas has much room for improvement. Let's talk!
+
+1. Open an issue here, describing what you're aiming to improve (we'll have some helpful discussion)
+2. Register an account on [RealtimeBoard](https://realtimeboard.com)
+3. Create a new board
+4. Select the Wardley Mapping Canvas from the templates
+5. Make desired changes and export the image as a high-quality jpg
+6. Fork the repository and open a pull request
+
+# The Canvas (v0.1.0)
+
+![Wardley Mapping Canvas](/Wardley%20Mapping%20Canvas.jpg?raw=true)