added test output mode for recreator testing

new option -to added for expression and translator testing, will
translate line and then recreate line text from translated rpn list, but
for now, just outputs "TEST:" in front of the rpn list text

updated test scripts to run the new -to test option on the expression
and translator test files; output of these files use the ".out"
extension to differentiate from the other ".txt" output files; added
expected .out files though currently these only contain the "TEST:" with
the rpn test (these will be updated as the recreator is implemented)