Week10

1. implement Health feature, UI looks poor now but we will improve it in the next few days. No worry! it is just a test. A little bit code part.

2. implement monster trace part and if you leave from monster's view, they won't follow you anymore. Some code below.

And at last, if you guys want to see how health bar and monster works， you can download gif image here.(img is over 3M, i can not show them here)