Node Forward messaging in README.

This is a first draft of messaging in the README about Node Forward. We're already getting a lot of speculation on twitter so the sooner we can come up with good messaging the better.
```
[open governance model](./CONTRIBUTING.md#governance) 
```

is better?

- [Relative links in READMEs](https://help.github.com/articles/relative-links-in-readmes/ "Relative links in READMEs")