Initial Commit of ChaosMonkey class
 - Support for the following features:
  - setting the chaos chance
  - defining custom chaos events, functions and probabilities
  - custom varying ajax delays
  - Fake XHR object which gets passed around with the potentional of wrapping a real xhr request within it.
  - ability to define standard responses for the built-in chaos events.
  - custom chaos events already implemented:
    - response_empty: 10,
    - response_404 : 10,
    - response_500 : 10,
    - response_200_false : 10,
  - Updated readme with some more information about configuation and usage.