Adding support for the Avatar methodology

executablecode/Makefile.src

modeling/MicroWaveOven_SafetySecurity_fullMethodo.xml

src/ui/AvatarMethodologyPanel.java

src/ui/IconManager.java

src/ui/MainGUI.java

src/ui/avatarmethodology/AvatarMethodologyDiagramName.java

.../avatarmethodology/AvatarMethodologyDiagramReference.java

...cusmethodology/DiplodocusMethodologyDiagramReference.java

src/ui/images/avatarmethodo.gif

src/ui/tree/DiagramTreeRenderer.java