Update on bool verification in AVATAR.

src/main/java/avatartranslator/AvatarStateMachine.java

src/main/java/avatartranslator/AvatarSyntaxChecker.java

src/main/java/myutil/BoolExpressionEvaluator.java

src/main/java/ui/AvatarDesignPanelTranslator.java

src/main/java/ui/avatarbd/AvatarBDPanel.java

ttool/src/test/java/myutil/BoolExpressionEvaluatorTest.java