Operator.java replaced by FOTierList.java and other classes updated

src/main/java/complexityparser/types/FOTierList.java

src/main/java/complexityparser/types/Tier.java

.../complexityparser/types/env/OperatorTypingEnvBuilder.java

src/main/java/complexityparser/types/env/TypingEnv.java

src/main/java/complexityparser/typingVisitors/FinalPass.java

src/main/java/complexityparser/typingVisitors/FirstPass.java

...main/java/complexityparser/typingVisitors/SecondPass.java

...parser/typingVisitors/base/BaseBlockStatementVisitor.java

...xityparser/typingVisitors/base/BaseExpressionVisitor.java

...exityparser/typingVisitors/base/BaseStatementVisitor.java

...ava/complexityparser/typingVisitors/base/BaseVisitor.java

...a/complexityparser/typingVisitors/base/ObjectVisitor.java