added Singleton Pattern
added placeholders in config.xml and inhalt.xml for pattern-IDs 11 and 12 changed number of buttons to match number of clickable attractions changed overviewList size to match number of patterns changed singleton activation
added placeholders in config.xml and inhalt.xml for pattern-IDs 11 and 12 changed number of buttons to match number of clickable attractions changed overviewList size to match number of patterns changed singleton activation