Making jasmine-react compatible with react version 0.11.1.

Changelog:
* 0.11 changed the location where a class' spec is defined
  (ie the functions the developer writes for a class).  So I had to
  change the location spyOnClass looks for the spec.

* 0.11 no longer throws errors when propType validations occur, so
  I see little value to specifying a class' displayName anymore because
  that is the only place a developer unit testing their application
  would care about it being a specific value.

* 0.11 changed the way getDefaultProps works such that it's only called
  once for each component on initialization.  I was using it in the
  unsupported way for my spyOnClass tests.  So I just switched my tests
  to use getInitialState.