Adding aggregation in CD

modeling/AVATAR/AirbusDoor_V2.xml

src/main/java/ui/ActionPerformer.java

src/main/java/ui/TGComponentManager.java

src/main/java/ui/TGUIAction.java

src/main/java/ui/avatarcd/AvatarCDAggregationConnector.java

src/main/java/ui/avatarcd/AvatarCDBlock.java

src/main/java/ui/avatarcd/AvatarCDConnectingPoint.java

src/main/java/ui/avatarcd/AvatarCDToolBar.java

src/main/java/ui/util/IconManager.java

src/main/resources/ui/util/avatarbdaggre.gif