CNAME: www.waffle-gl.org

Github strongly recommends that the project's github.io site redirect
from a CNAME record, not an A record.

From the Github help pages:
> We strongly recommend that you use a custom subdomain instead of
> a custom apex domain for the following three reasons:
>
> - A custom subdomain gives your GitHub Pages site the benefit of our
>   Content Delivery Network.
> - A custom subdomain will not be affected by changes in the underlying IP
>   addresses of GitHub's servers.
> - A custom subdomain allows pages to load significantly faster than
>   a custom apex domain because its Denial of Service protection can be
>   implemented more efficiently.

Let's be a good net citizen and decrease Github's overhead.  Change the
CNAME from waffle-gl.org to www.waffle-gl.org.
README: Refer users to waffle mailing list