Building -----------------------------------------------------------------------

    If the executable are missing for C version of the assignment, run
    $ gcc *.h *.c -o fs


Execution ----------------------------------------------------------------------

    Run the program:
    
        $ ./fs


    The program will ask if you want to load an existing disk or make a new one:

        Create a new disk? (y/n):


    If this is the first time running the program, enter 'y' to create and
    name the new disk:

        Create a new disk? (y/n): y
        Name the new disk: mydisk


    After that, the program runs automatically and exits.

    There's no special arguments needed. The main function runs a series of
    tests using the functions defined.


    If you want to load an existing disk, run the program again and choose 'n'
    when asked to create a new disk:

        Create a new disk? (y/n): n
        List of available disks:
          test1
          test123
          asdf
        Enter the name of disk to load: