Implement Skeptic pattern as a CircuitBreaker alternative

There's an interesting pattern called a "Skeptic" presented in this paper:

http://www.hpl.hp.com/techreports/Compaq-DEC/SRC-RR-77.pdf

(as seen on Werner Vogel's blog). It's somewhat similar to a CircuitBreaker but has different recovery behavior and perhaps deals better with intermittent problems. This would make an interesting addition to JRugged.