Merge pull request #853 from patriot1burke/master

fix JWS impl, fix contributor SAML PR
Merge pull request #854 from patriot1burke/master

jetty 8 support
overview update
KEYCLOAK-839 Auth Server overlay enhancements
KEYCLOAK-839 Auth Server overlay enhancements
Merge pull request #855 from ssilvert/subsys-enhancements

KEYCLOAK-839 Auth Server overlay enhancements
Merge remote-tracking branch 'upstream/master'
tomcat8
tomcat8