Add redirect/DNS entry for "www" subdomain

[Bloodninj]

This isn't to do with the contents of this repo as such, so sorry if this is the wrong place.

For those few people who still type www., or use keyboard shortcuts on their browser (Ctrl + Enter prepends www. and appends .com to the contents of the URL bar in the majority of desktop browsers), the site currently returns a HTTP 404 error. A redirect could be set up to point to the domain root; alternatively, point the www subdomain to the same root folder and both with and without the subdomain should continue to work.