Revision 892

The script now reads takes the form data in problemContents
and displays it in a textarea form.  If there is no problemContents
it reads from the file in template directory.
The script is called with .../instructor/pgProblemEditor/set10/prob1
 I'm using the
current convention for labeling files in the template directory.
Using '10' for set10 will not work right at the moment.  .pg
and the course template directory are combined with the path components
to determine the path to the file.

It remains to add the rest of the editing buttons and provide a method
for saving to the template file.

-- Mike