added Reflect damage particle prefab, added HealOnKil Powerup on tutorial level
Merge branch 'develop' into JackySprint10

Conflicts:
	UnityProject/Assets/Resources/Prefabs/GameSetUp/PrefabManager.prefab
	UnityProject/Assets/Scripts/Constants/PrefabConstants.cs
updated PrefabManager prefab
Merge pull request #83 from jackykschou/JackySprint10

Jacky sprint10