DESCRIPTION ABOUT P1
Author: Yuting Liu
Jan, 28, 2016

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1a. Sorting
After compiling the file, run command:
  shell% ./fastsort [ -n] file
Here, n is the nth word of every line ordered by in the sorting.

[-n] is optional. If no [-n] specified, the sorting will in alphabetical order of 1st word.
Otherwise, the sorting will in alphabetical order of nth word. if n is larger than the length of sentence, 
it will use the last word for the sorting.

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1b. Kernel/xv6

I have already added the system call: getprocs(), which will loop the proc table to check the status of all processes.
Return the number of processes that is not in the status of unused.

For the testing of getprocs() function. I have written a "int testgetprocs(void)" function in user/ folder.
Then running "make qemu" when qemu prompt, run the command:
  $ testgetprocs();
The result of running function of getprocs() will be provided.