Adding CSV Object in myutil + test. Icons for playing trace in avatar simulation

src/main/java/avatartranslator/AvatarSyntaxChecker.java

...tartranslator/directsimulation/AvatarSimulationBlock.java

src/main/java/myutil/CSVObject.java

src/main/java/myutil/FileUtils.java

src/main/java/ui/MainGUI.java

src/main/java/ui/SimulationTrace.java

...ractivesimulation/AvatarInteractiveSimulationActions.java

...vatarinteractivesimulation/AvatarMainCommandsToolBar.java

...eractivesimulation/JFrameAvatarInteractiveSimulation.java

src/main/java/ui/file/CSVFileFilter.java

src/main/java/ui/tree/JDiagramTree.java

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

src/main/resources/ui/util/steptrace24.gif

ttool/src/test/java/myutil/CSVObjectTest.java