Description:

     Create a class called ExternalSort.

     Your class should have the following methods.  

   80 points
   a) public static > void sort(T array[], int size)

          As it runs, it should print its progress as in this example:

             Writing runs of size 4.
             Merging to runs of size 8.
             Merging to runs of size 16.
             ...
             Done
          

   20 points
   b) public static void main(String args[])

          Accepts filename to sort and run size as command line arguments.
          Calls the sort routine.
          Writes the sorted result to a file named sorted.txt.