fix strt medus
Merge branch 'master' of https://github.com/Rolom/medusa

# By Micho Castro
# Via Micho Castro
* 'master' of https://github.com/Rolom/medusa:
  Added threshold to StageManager for change of list of levels.
  no message

Conflicts:
	JellyFish/Assets/Resources/JellyFishDieParticle.prefab
	JellyFish/Assets/Resources/PlactomDieParticle.prefab
	JellyFish/Assets/Scenes/Stage_randomScenario.unity
	JellyFish/JellyFish.userprefs