[Pages] Add Ability to Compare Versions in History

Problem statement:

I require students to work collaboratively. But not all students participate or participate equally. Instructors need a way to determine the degree and quality of each team (group) members participation on a project.

Proposed solution:

Create the ability to compare versions of a document in the "PAGES" tool, to display what changes student made and the percent of the changes made. This would allow instructors to adjust individual group members' grades based on the quantity and quality of a participation. In this way, a student is not given full (or any) credit for insufficient participation; and it allows the instructors to ensure that students who do participate fully and effectively do not have their grades negatively impacted by group members who don't collaborate sufficiently.

User role(s):

instructor