Thanks very much for Thomas Robb for submitting the original
modification with the new functionality ... I ended up doing a
lot of cleaning up and reworking of it but it wouldn't have been
done without Thom's work.
The code for reviewing an existing attempt is now separate
in review.php and now has a log entry of it's own.
The overview and regrade reports are now in separate subdirectories
under the "report" directory. Each has a primary "report.php" file
which implements the report as a class.
These existing reports are very simple, but now more complex ones
can easily be written. (I am about to do one).
