First Translator Memory Leak

The first memory leak, which occurred on every expression and translator test, was easy to identify and correct as the Analyzer pointed directly to the problem.  The memory issue was reported in the translator start() function with the RPN (reverse polish notation) list allocated there.

For expression test 1, 13 blocks were reported lost, which exactly coincided with the number of test expressions.  This made it obvious that the memory allocated for the RPN list object was not being released.  In the translate input routine, after the resulting tokens in the RPN list were output, the memory allocated for each token was released.  However, the RPN list object itself was not released.

After the correction, all the expression and translator tests were rechecked with the Analyzer.  Translator tests 6 and 7 were still reporting memory issues.