Added a default Controller that logs CSP Violations to the logger as notices.

This resolves Issue #18 by adding a default Controller that logs CSP Violations as notices. 

My only worry is that this implementation may allow for an attacker to fill the logs with bogus security events. I could add a token and expiration of this token, but don't know how valuable that would be and I would have to require some form of state.

Let me know what you think.