increase version
add new configuration option 'serverId' so language-specific content can be displayed depending on the value of that option
don't crash if outputCH is not set
display the language-specific parts depending on serverId
remove the 'subscribe to mailing list during registration' feature - was specific to openthesaurus.de and will need to be implemented in a different way anyway, as openthesaurus.de is going to switch mailing list providers
increase version
small layout cleanup