read the value of the getRemoteUser() call to determine if an external authentification method was used
fix position of the login button (must be right from the label)
do not show the logout button if the user cannot logout using ANNIS
check remote user login already in init function
do not implement the insecure "auto-login" feature
Merge pull request #229 from thomaskrause/feature/schibboleth

Do not show login-button but the username if the remote user variable is set