Dead link in the README

[olivierlambert]

The new link on the new Xen Website for XAPI project is: https://xenproject.org/projects/xapi/

[robhoes]

Feel free to open a PR :)

[edwintorok]

https://www.w3.org/Provider/Style/URI

What makes a cool URI?
A cool URI is one which does not change.
What sorts of URI change?
URIs don't change: people change them.

We just reorganized our website to make it better.
Do you really feel that the old URIs cannot be kept running? If so, you chose them very badly. Think of your new ones so that you will be able to keep then running after the next redesign.

Is the new link a cool URI?