/cas/samlValidate must enforce a required authn_method
Fixed typo
Fixed typo.
Changed mfa argument extractors to be communicated as a set rather than a list.
Merge branch 'master' into SAML-AUTHN-METHOD

Conflicts:
	cas-mfa-web/src/main/webapp/WEB-INF/mfa-servlet.xml
Merge pull request #42 from Unicon/SAML-AUTHN-METHOD

/cas/samlValidate must enforce a required authn_method