Link to the old nodejs.org repo in readme

[phillipj]

Added link to the old repo for nodejs.org in the readme, there are occasions where going through that repo for old are needed - e.g. for old blog articles and URLs.

And lets see if we're lucky enough to get a newly born bot commenting here.. fingers crossed

[ghost]

Travis build passed 👍

[stevemao]

@phillipj Why do we use a bot instead of a hook (PR checks)?

[phillipj]

@stevemao the short answers is we can't due to strict security policy in the organization. The long story are described in #355

[mikeal]

We can use hooks at the repo level just fine, it's org wide hooks that are the problem. We can allow org wide reads because we have security info and secrets in a few private repos.

[phillipj]

@mikeal Travis supposedly requires org wide access #355 (comment). If you know any a way around it, please let me know.