Merge pull request w3c#18 from MichielBijl/patch-1

Add basic outline to README.md

README.md

@@ -2,12 +2,16 @@
 
 This is the repository for the [Working Draft of the HTML specification](https://w3c.github.io/html/)
 
+## Editorial Documentation
+
 The specification is built using Bikeshed. If you would like to propose edits, please make sure that they result in a specification that will build correctly, by testing in your own clone of the repository.
 
 1. Install [bikeshed](https://github.com/tabatkins/bikeshed)
 2. From the HTML folder open a command prompt
 3. run bikeshed: `'bikeshed -f spec'`
 
+## Contributing to this Repository
+
 Use the standard fork, branch, and pull request workflow to propose changes to the specification. Please make branch names informative - by including the issue or bug number for example.
 
 More information on contributing is in [CONTRIBUTING.md](CONTRIBUTING.md).