Added StateSyncGroup for different Item Types

eraser-base/src/main/jastadd/AdditionalTypes.jadd

eraser-base/src/main/jastadd/Item.jrag

eraser-base/src/main/jastadd/Navigation.jrag

eraser-base/src/main/jastadd/Printing.jrag

eraser-base/src/main/jastadd/Resolving.jrag

eraser-base/src/main/jastadd/Rules.jrag

eraser-base/src/main/jastadd/Rules.relast

eraser-base/src/main/jastadd/eraser.flex

eraser-base/src/main/jastadd/eraser.parser

eraser-base/src/main/jastadd/shem.relast

...de/tudresden/inf/st/eraser/parser/EraserParserHelper.java

...n/java/de/tudresden/inf/st/eraser/util/MemberPrinter.java

.../main/java/de/tudresden/inf/st/eraser/util/TestUtils.java

...e/src/test/java/de/tudresden/inf/st/eraser/RulesTest.java