Inside content_highlights.py, we had code to calculate due dates for when there isn't graded content, but we could only reach that code path if the user had an assignment with a due date at the target date. Now we will check for all learners who could be in range of having an update and let the code in content_highlights.py decide if a highlight should be sent
common ------ This directory contains common code shared between LMS and CMS, such as Mako templates, CSS, and Coffescript.