Move website to clean-css.github.io

[johannchopin]

Since the repo is now moved to his own organisation, we could extract the /website folder to his own repo in the organisation called clean-css.github.io so it can be deployed on https://clean-css.github.io instead of https://clean-css.github.io/clean-css/.

[jakubpawlowicz]

Makes sense to me 👍 Do you have rights to do so?

[johannchopin]

I should have them since I can create a new repo. I will let you know if I face some problems.

[jakubpawlowicz]

👍