Added Netflix's Hystrix library using Javanica, and provided a simple example (and tests)

Kudos to Lieven Doclo and his blog for inspiration! http://www.insaneprogramming.be/blog/2014/08/19/hystrix-spring-boot/
Merge pull request #1 from daniel-bryant-uk/hystrix-experiment

Added Netflix's Hystrix library using Javanica, and provided a simple ex...