Added cloudflare action

This ruleset was created based on information found at http://www.normyee.net/blog/2012/02/02/adding-cloudflare-support-to-fail2ban/

I have simplified it down to a single action file with broken out configuration options:

cftoken is your Cloudflare API key which can be found by going to https://www.cloudflare.com/my-account and logging in. Toward the bottom should be your API key.

cfuser is the email address you use to login to Cloudflare
should may be that original url and Norm Yee be mentioned as well? ;-)