Uploading with the Stopwatch.

To run the FromXTrain.java with the Stopwatch, please work in the
"DehnTwistCalculator" file. Otherwise, it may not be working. So, to
making sure that the file can run in the "DehnTwistCalculator" file, I
copied the all the source of the xtrain to the "DehnTwistCalculator"
file...