Adding icons for method

src/main/java/ui/ActionPerformer.java

src/main/java/ui/TGUIAction.java

...ui/avatarmethodology/AvatarMethodologyDiagramToolbar.java

...y/DiplodocusMethodologyDiagramReferenceToApplication.java

...i/sysmlsecmethodology/SysmlsecMethodologyDiagramName.java

...mlsecmethodology/SysmlsecMethodologyDiagramReference.java

...ysmlsecmethodology/SysmlsecMethodologyDiagramToolbar.java

...ecmethodology/SysmlsecMethodologyReferenceToAnalysis.java

...ethodology/SysmlsecMethodologyReferenceToApplication.java

...thodology/SysmlsecMethodologyReferenceToArchitecture.java

...ethodology/SysmlsecMethodologyReferenceToAssumptions.java

...lsecmethodology/SysmlsecMethodologyReferenceToAttack.java

...sysmlsecmethodology/SysmlsecMethodologyReferenceToCP.java

...lsecmethodology/SysmlsecMethodologyReferenceToDesign.java

...mlsecmethodology/SysmlsecMethodologyReferenceToFault.java

...secmethodology/SysmlsecMethodologyReferenceToMapping.java

...methodology/SysmlsecMethodologyReferenceToProperties.java

...cmethodology/SysmlsecMethodologyReferenceToPrototype.java

...ethodology/SysmlsecMethodologyReferenceToRequirement.java

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