Adding test model for tags

modeling/test/testTag.xml

...n/java/avatartranslator/AvatarCompactDependencyGraph.java

src/main/java/avatartranslator/AvatarSpecification.java

src/main/java/cli/Action.java

src/main/java/graph/AUTGraph.java

src/main/java/graph/GeneralGraph.java

src/main/java/graph/GeneralState.java