finish loading arguments and passing to qbrt code

also now reversed and passed through in the correct order
move all test data files into T/DATA/

this will put input and output files for a particular test program
together and will avoid having to make a new directory to put files
containing test arguments
test the echo program with cmd line arguments

update the Rakefile enable testing any program with command line arguments
put in more error checking

write the error to the console if it fails all the way down to main
also add a test to exercise this behavior