Added Set Sprite Order command

https://trello.com/c/5yZ88Rh0

Assets/Fungus/Sprite/Scripts/Commands/SetSpriteOrder.cs

@@ -0,0 +1,76 @@
+using UnityEngine;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Fungus
+{
+	[CommandInfo("Sprite", 
+	             "Set Sprite Order", 
+	             "Controls the render order of sprites by setting the Order In Layer property of a list of sprites.")]
+	[AddComponentMenu("")]
+	public class SetSpriteOrder : Command 
+	{
+		[Tooltip("List of sprites to set the order in layer property on")]
+		public List<SpriteRenderer> targetSprites = new List<SpriteRenderer>();
+
+		[Tooltip("The order in layer value to set on the target sprites")]
+		public IntegerData orderInLayer;
+
+		public override void OnEnter()
+		{
+			foreach (SpriteRenderer spriteRenderer in targetSprites)
+			{
+				spriteRenderer.sortingOrder = orderInLayer;
+			}
+
+			Continue();
+		}
+		
+		public override string GetSummary()
+		{
+			string summary = "";
+			foreach (SpriteRenderer spriteRenderer in targetSprites)
+			{
+				if (spriteRenderer == null)
+				{
+					continue;
+				}
+
+				if (summary.Length > 0)
+				{
+					summary += ", ";
+				}
+
+				summary += spriteRenderer.name;
+			}
+
+			if (summary.Length == 0)
+			{
+				return "Error: No cursor sprite selected";
+			}
+
+			return summary + " = " + orderInLayer.Value;
+		}
+		
+		public override Color GetButtonColor()
+		{
+			return new Color32(235, 191, 217, 255);
+		}
+
+		public override bool IsReorderableArray(string propertyName)
+		{
+			if (propertyName == "targetSprites")
+			{
+				return true;
+			}
+
+			return false;
+		}
+
+		public override void OnCommandAdded(Block parentBlock)
+		{
+			// Add a default empty entry
+			targetSprites.Add(null);
+		}
+	}
+}

Assets/Fungus/Sprite/Scripts/Commands/SetSpriteOrder.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 5d1724bb98f694376b7653fa24a54541
+timeCreated: 1439385260
+licenseType: Free
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: