adding postgres logfile to ignore list
Re #1206 - multilang: My Europeana, Language Settings

* updated getString params to match cookie keys
* added placeholder for ajax modification method USER_LANGUAGE_SETTINGS
* updated message.properties to use new messages for save settings
* re-worked the language settings form so that it only uses one form instead of 3
* re-worked language settings field ids and names for better consistency
* re-worked the js in order to handle the new scenarios - not logged in, use cookie; logged in, use my europeana db values