Sounds for jump and hit
Merge branch 'master' of github.com:andreiagaita/PersonalSpaceInvader
Sound manager prefab, main menu scene, game manager as a singleton
Merge branch 'master' of github.com:andreiagaita/PersonalSpaceInvader

Conflicts:
	Project1/Assets/Scripts/GameManager.cs
Fix assigning soundmanager
Merge branch 'master' of github.com:andreiagaita/PersonalSpaceInvader