Repair game collection iterator
Basic Enemy Class
Improved Enemy prefab
introduced BulletCollection (already working) and EnemyCollection (still to link)
Merge remote-tracking branch 'origin/Game_prototype' into Game_prototype

Conflicts:
	ProjectSpaceshooter/Headers/Enemy.h
	ProjectSpaceshooter/Sources/Enemy.cpp
	ProjectSpaceshooter/Sources/GameData.cpp
Ok, working again