fixed a bug

fixed a bug when use lookAt() method, point detection didnt work.
got ridof translate, rotate and loadIdentity from Box and wall.
Add another rotating method
add lighting (still doesn't look good) and got rid of unuse methods
changed vertex order to unti-clock wise and add normal on each face

sphere didn't rendered properly because of face direction.
so I made every faces(Wall, box) to other way around. add normal to it.
changed vertex order to unti-clock wise and add normal on each face

sphere didn't rendered properly because of face direction.
so I made every faces(Wall, box) to other way around. add normal to it.
fixed a bug

swap north and south. so that direction and doors rendered correctly
changed light brightness

does it look better now??
Merge branch 'master' of https://github.com/ChaoHou/Swen222-Group-Project