Add a 'New and 'Noteworthy' stub to the docs for the 1.0-SNAPSHOT release. The section can be maintained in step with the code.

This would keep the docs consistent, and may help avoid confusion around which features are included in which releases [1],[2].

[1] https://groups.google.com/forum/#!topic/spockframework/atRzlB4UQc0 [2] https://groups.google.com/forum/#!topic/spockframework/7t7YJumjvTc