added SystemC-AMS DE clock

src/main/java/syscamstranslator/SysCAMSSpecification.java

src/main/java/syscamstranslator/SysCAMSTClock.java

src/main/java/syscamstranslator/SysCAMSTCluster.java

.../java/syscamstranslator/toSysCAMSCluster/ClusterCode.java

...stranslator/toSysCAMSCluster/TopCellGeneratorCluster.java

src/main/java/ui/TGComponentManager.java

src/main/java/ui/TGUIAction.java

src/main/java/ui/syscams/SysCAMSClock.java

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

src/main/java/ui/window/JDialogSysCAMSClock.java

src/main/resources/ui/util/clock.png