Assignment 1 update.

I've adjusted the assignment to clarify the code structure:

  hdr(3, Player Public Classes)

  <p>
  Your code should offer a set of publically-accesible classes in a package
  called cde(playerAPI) (the case is exact).  You may include other packages if
  you wish, but cde(playerAPI) is the only package a front-end to your game
  needs to access directly.  Java interfaces are not required in
  cde(playerAPI), but you may use them if you wish.
  </p>

  <p>
  It must be possible to implement a front-end to your game entirely through
  the public entities in the cde(playerAPI) package, passing requests to the
  back-end and getting repsonses back.  Your back-end implementation must not
  perform GUI- or terminal-based I-O.  You may use such I-O to develop and test
  your code, but it must be possible to use your back-end without having it
  perform any GUI- or terminal-based I-O.
  </p>

I've also added an example of documentation.  For some reason the package
documentation isn't showing up; I'll have to figure out why.