Added one more test to exercise generation of the cases statement
Added test to exercise generation of the return statement when the expression is union typed
Added generation of the return statement when the return statement is union typed
Added support for generation of the error statement
Updates to test results related to generation of the tuple pattern
Added a few tests revealing problem with generation of the tuple/record pattern when the conditional expression in a cases statement/expression is of a union type
Updated Tuple library class with functionality to check tuple compatibility against types
Added fix for generation of the cases statement/expression when the conditional expression is union typed.