Added hair, facial hair, magic mirror (#452)

* Added hair, facial hair, magic mirror

* I forgot to commit the textures lmao

* Use shader to fix hair color blending

Content.Shared/Preferences/Appearance/HumanoidCharacterAppearance.cs

@@ -0,0 +1,11 @@
+using System;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Preferences.Appearance
+{
+    public enum HumanoidVisualLayers
+    {
+        Hair,
+        FacialHair,
+    }
+}