feat(csrfDoubleSubmit): allow annotation csrfDoubleSubmit on controller
class

allow annotation csrfDoubleSubmit on controller class
add documentation
Merge pull request #3 from jaugustin/csrfDoubleSubmit_class_annotation

feat(csrfDoubleSubmit): allow annotation csrfDoubleSubmit on controller class
Replace BadRequestHttpException with HttpException

Fixes #4
Remove VersionListener from the doc, skip the test as it does not work for know reasons
Minimum sf2 version is 2.1
Add support for non conventional controller returns