* Fixed off-by one problem in computing error matrix.
* Using abs() for relative error now, which should work
  with oscilating functions and functions with negative vals.
* Changed copyright header text to reflect course instructors
  and allow for other student collaborators
* Added a shellscript in the root dir to grep out any <cite>foo</cite>
  references out of source-code comments. This can be used to
  make a list of references used.