Merge the direction enum from branch 'weber'

Bomber.cpp

Bomber.hpp

Enemy.cpp

Enemy.hpp

Enemyprojectile.cpp

Enemyprojectile.hpp

Level.cpp

Position.hpp

Projectile.cpp

Projectile.hpp

Tank.cpp

Tank.hpp

Trooper.cpp

Trooper.hpp

main.cpp

player.cpp

player.hpp

playerprojectile.cpp

playerprojectile.hpp