Update homework solutions.
The remaining part will be finished in due time.
Update Homework 3.
Generally the solution part of homework 3 is finished.
TODO: Artificial Intelligence homework, open course and the reviewing
process of UCC501.
Update the rotation of figures in HW3.
Update lecture notes and homework solutions.
Added new lecture notes and finalize the solution for Homework 3.
Merge branch 'master' of github.com:ProfessorX/UCC501