Update README.md
Merge branch 'master' of https://github.com/RoboNickBot/ateam-tanks
forgot to pull before I merged in prototype2
added vector3d and direction classes, switched values from ints to doubles
fixed things
Merge pull request #13 from RoboNickBot/better-values

Better values
added obstacle class
HitBox added to sprites, collision test not yet implemented
Merge pull request #15 from RoboNickBot/obstacles

Obstacles and HitBoxes