updated toplevel todo
finished typing up project 4
added trivial readme
updated the "turn in" section
finished week-9
updated toplevel readme
updated toplevel readme and project-4 sample output
updating

- removing project-4 from HEAD, since it hasn't actually been assigned
  yet.  Should be safe enough in the history though? lol.  Anyone
  involved enough to find it there should probably be involved enough to
  know that things are tentative until the professor actually assigns
  them.