[OSy] Results of task #2, opt A (labs)

[Vojtech Horky]

Dear all,
I have submitted results from the second task (first run) to SIS.

If you have passed, you should see a tick next to "Task 2 (labs)". If 
your implementation does not work as expected, you should find a short 
explanation in "Task 2 (notes)".

Please, contact me ASAP if you find any discrepancies (e.g. you think 
your solution is correct, you sent it but fields in SIS are empty ...).

Generally the solutions were good. One very small issue that was present 
in 80% of the solutions: it would make more sense to use macros from 
virtptr_t for the shifts instead of FRAME_WIDTH (practically the numbers 
are obviously the same but it better corresponds with the abstraction 
level).

Thanks,
- VH