Wrong register message shown, when 'Settings.emailRegistration' enabled

When E-Mail registration is set to true, the wrong register message is displayed. It says to register with a password, which obviously does not work.
I added a check for E-Mail registration and a message to all language files, so new players are prompted correctly.

BTW. My IDE killed some trailing whitespace, so the diff of AuthMePlayerListener.java looks a bit stupid. Mea culpa...