manually do a interactive exercise request (#2045)
remove old crufty comment
regrade command (#2045)

Walk through examrecords for a course and re-run the student-submitted
answers to see if any scores have changed.  If so, then print a line
with "REGRADE", and if -u is specificied, actually update the database.
re-add exception handling to regrade util (#2045)
Merge pull request #2053 from Stanford-Online/sef-2045-interactive-grader

grading utilities: hitgrader and regrade (#2045)