Finish phase 1 of project #1

Add the 'hog' directory. With 'hog.py' edited to pass the phase 1 tests.

Signed-off-by: kfei <kfei@kfei.net>
Finish phase 2 of project #1

The final strategy gets an average win rate greater than 0.55.

Signed-off-by: kfei <kfei@kfei.net>