corrected parser and unary operator issues

parser errors were not being handled correctly in all cases and when a
unary operator occurred when a binary operator should, the error message
should have included "binary" in front of operator

getToken() modified to only return number parser errors in operand mode
when the current data type if not a string

translate2() expression only test mode modified to look for a
non-numeric parser error and set the ExpOpOrEnd status

getExpression() for parentheses expression processing modified to see
if the terminating token is a unary operand and set status to new
ExpBinOpOrParen status; when getting binary operator or
end-of-expression token, no longer returns ExpOpOrEnd status (parser
error returned and caller determines actual status)

getOperand() modified upon an error from getToken() if not reference
mode, error status is still returned, but for reference modes, if a
parser error then the length of the error is set to one before returning
the expected reference status for the current data type and reference
mode

getInternalFunction() modified if getExpression() returns a parser
error, then the parser error is returned if it is a numeric parser
error; for other parser errors or if the terminating token is a unary
operator, the appropriate error is return, however, for a unary
operator, the appropriate error with "binary" in front of "operator" is
returned

getParenToken() modified to look for a parser error from getExpression()
otherwise if the terminating token is a unary operator, then the new
ExpBinOpCommaOrParen status is return

added new ExpBinOpOrComma, ExpBinOpCommaOrParen, ExpBinOpOrParen(), and
ExpBinOpSemiOrComma token statuses for unexpected unary operator errors;
reformatted token status messages array to prevent long line and
adjusted enums.awk for these changes

added several unexpected unary operator error statements to translator
test #14 (parser errors), most of which were not previously tested; old
translator fails many of these tests, so its output was saved to another
file (new translator passes all tests in #14 except for the
unimplemented PRINT and INPUT statements