lml/ost — pull request #257 by kevinburleigh75 (2013-04-04 00:17:29+00:00)
Title: Adds Completed column to report.xls

This should (at least partially) resolve issue #194.

This column reflects StudentExercise.complete?, meaning that a multiple-choice answer has been locked in, and can be used as a key for understanding other grade-related columns.