changed name for node ref (eln)

src/main/java/elntranslator/ELNSpecification.java

src/main/java/elntranslator/ELNTModule.java

src/main/java/elntranslator/ELNTNodeRef.java

src/main/java/elntranslator/toELN/ModuleCode.java

src/main/java/ui/ELNPanelTranslator.java