Added in the start of the ratings screen
Merge branch 'master' into L4DEV

Conflicts:
	Assets/Resources/Scenes/Level_4/L4_Spawner.cs
	Assets/Resources/Scenes/Level_4/Level_4_Boss.unity
	Library/assetDatabase3
	Library/guidmapper
	Library/metadata/c7/c75f98769577fe24a8b13c7ca51d4dd2
	ProjectSettings/TagManager.asset
L4 Balance

Made player slower thru trench
Made turrets shoot more slowly, with bullets that travel slowly as well