R:Testing

Use the following procedure to test Rmpi
 * 1) Start R by typing "R" at the command prompt
 * 2) Copy the code from here into R
 * 3) Watch as it runs to see how many slaves were spawned
 * 4) See if all the slaves responded with "I am n of nn",
 * 5) * n is the slave number, and nn is the total number of slaves
 * 6) If you got  the correct output, you're done.