Adding support for mapping fork channels

modeling/DIPLODOCUS/SmartCardProtocol_sec.xml

src/main/java/tmltranslator/TMLMapping.java

src/main/java/tmltranslator/TMLModeling.java

src/main/java/ui/GTMLModeling.java

src/main/java/ui/MainGUI.java

src/main/java/ui/tmlcompd/TMLComponentTaskDiagramPanel.java

src/main/java/ui/tmldd/TMLArchiCommunicationArtifact.java