Rich&Michal: Better date validation, introduced e-mail validation.
Merge branch 'master' into advanced_date_validation

Conflicts:
	rps/feature_tests/create_claimant.feature
	rps/feature_tests/steps/paddle_steps.py
	rps/feature_tests/steps/utils.py
Merge pull request #145 from InsolvencyService/advanced_date_validation

Advanced date validation