move and remove unecessary files

Applications/Asteroids/Entities/Asteroid.cpp

Applications/Asteroids/Entities/Asteroid.h

Applications/Asteroids/Entities/Bullet.cpp

Applications/Asteroids/Entities/Bullet.h

Applications/Asteroids/Entities/Entity.cpp

Applications/Asteroids/Entities/Entity.h

Applications/Asteroids/Entities/Ship.cpp

Applications/Asteroids/Entities/Ship.h

Applications/Asteroids/Game.cpp

Applications/Asteroids/Game.h

Applications/Asteroids/Physics.cpp

Applications/Asteroids/Physics.h

Applications/Asteroids/Set.h

sextant/Utils/FixedPoint.h

sextant/Utils/Vec2.cpp

sextant/Utils/Vec2.h

sextant/Utils/utils.cpp

sextant/Utils/utils.h