Scoring of questions in grading

[vkaravir]

We should add support for AVs where a grade is given based on the answers to questions presented during the AV.

[cashaffer]

I am not sure exactly what this means... but hopefully you do. :)

[vkaravir]

This issue is the result of the discussion in issue #44. There, you commented:

perhaps we want to put questions inside an AV. Perhaps as an alternate way to generate points for grading (the same kind of points as are in proficiency exercises). So for example, in the Heapsort proficiency exercise, there might be a couple of multiple choice questions such as "What is the asymptotic running time of the algorithm?" This could be worth a point on the score.

That would've probably made a more understandable description of the issue.