First commit of sorting using WQ.

- This sorts records by partitioning the input file and running sort on
  each piece.
- The merging of the sorted pieces is done at the master and the sorted
  records are printed to an output file.
- It takes two arguments:
	1. first argument is the path to the sort program to use
	2. second argument is the path to the input file

  Example:
	./wq_sort /usr/bin/sort input.txt