add images for logins with google and github
remove unused arguments
login protected pages configured by pattern securedByLoginURLPattern in login
add set('securedByLoginURLPattern', '/members/.*') to app_test
move newUserMustFillInRegistration logic to authentication module
and apply it only when a protected page is visited
Merge pull request #77 from dpolivaev/master

Änderungen in Authentisierung und Erstanmeldung
redirect pattern angepasst
redirect korrigiert
layout für login