DOC: Added a script demonstrating the use of the SKLLearnerAdapter class.
Merge branch 'master' of github.com:neurosbh/PyMVPA into neurosbh-master

* 'master' of github.com:neurosbh/PyMVPA:
  DOC: Added a script demonstrating the use of the SKLLearnerAdapter class.
DOC: Polish SKL classifier example.