0001 task added
task 1 and 2 added. Also a sqlalchemy tutorial..
task 0000 added. Pillow lib needed.
modified 0001
more sophisticated change for sqlalchemy. 0002
preliminary solution for task 0004 added.
Merge pull request #9 from effyhuihui/master

effy folder added. Two subfolder for task 0001 and 0002 added.