Remove the working tests from the TODO block

NOTE: when I did this, now all tests pass but if I remove
the remaining TODO blocks then the tests fail again.  I
think there may be one more offset or count bug in there.
Add another test to the TODO block

This code has an additional FAIL subtest immediately after
the previous subtest 83.  Smells like something is still
off.
die when trying to push past allocated rpn stack size
increase rpn stack size for =, < and > by one to prevent invalid writes