Improvements on files

plugins/howto

src/main/java/avatartranslator/AvatarBlock.java

src/main/java/avatartranslator/AvatarSpecification.java

src/main/java/avatartranslator/AvatarStateMachine.java

src/main/java/avatartranslator/AvatarSyntaxChecker.java

src/main/java/avatartranslator/AvatarTimerOperator.java

...tartranslator/directsimulation/AvatarSimulationBlock.java

...ava/avatartranslator/modelchecker/SpecificationBlock.java

src/main/java/myutil/MyMath.java

src/main/java/ui/AvatarDesignPanelTranslator.java

src/main/java/ui/TAttribute.java

src/main/java/ui/window/JDialogAvatarBlock.java