Created CNAME to allow serving for our domains

Per https://help.github.com/articles/setting-up-a-custom-domain-with-pages

This will also accept traffic for the zone apex (csclug.org) and redirect it to www.

Need to add to DNS for csclug.org:
A record for the zone apex for 204.232.175.78
CNAME for www for csclug.github.com