Version checking: do not poll github when running master, and store result in session.
Version checking: do not poll github when running master, and store result in session.

jschlyter/simplesamlphp,sitya/simplesamlphp,simplesamlphp/simplesamlphp,dnmvisser/simplesamlphp,dnmvisser/simplesamlphp,ghalse/simplesamlphp,ghalse/simplesamlphp,dnmvisser/simplesamlphp,sitya/simplesamlphp,jschlyter/simplesamlphp,jschlyter/simplesamlphp,sitya/simplesamlphp,simplesamlphp/simplesamlphp,ghalse/simplesamlphp,ghalse/simplesamlphp,jschlyter/simplesamlphp,simplesamlphp/simplesamlphp,dnmvisser/simplesamlphp,jschlyter/simplesamlphp,sitya/simplesamlphp,simplesamlphp/simplesamlphp