Grades chart

A simple Moodle assign feedback plugin, allowing students to check how other students handled a given task by presenting their grades on a chart.

Student will see the chart if all of the following requirements are met:

1. The grading type for the assignment is "Point",
2. The feedback type "Grades chart" is enabled for the given assignment (it will be enabled by default),
   
3. Assignment is due,
4. Student has made a submission.

Teacher will also see the chart when grading a given submission (regardless of due time).