recreate internal functions

added push with operands functions taking a name and the count of
operands, which pushes name followed by the operands from the stack
separated by commas and followed by a closing parentheses

added internal function recreate function that gets name and operand
count from table for code of internal function and calls push with
operands (also works with no argument functions), and added this
function to all the internal function code table entries

added blank recreate function that does nothing for hidden internal
codes, added this to the CvtInt and CvtDbl code table entries

changed expression test 3 (parenthetical tokens) and test 4 (internal
functions) output results to the correct expected results (not all the
expressions in test 3 work correctly yet)