Added research state to harvest and crafting

Scripts/DSL/Nodes/CraftNode.cs

@@ -67,6 +67,7 @@ public class CraftNode : ProgramNode
 		options.AddItem("Select item...");
 		foreach (ItemData item in GameData.availableItems.Values)
 		{
+			if(GameData.availableResearch[item.Research].state != ResearchState.RESEARCHED) continue;
 			if (item.Inputs.Count > 0)
 			{
 				options.AddItem(item.GetReadableName());

Scripts/DSL/Nodes/HarvestNode.cs

@@ -19,7 +19,7 @@ public class HarvestNode : ProgramNode
 
         if (!tile.resource.CanExtract())
         {
-            lastExecutionMessage = "Resource is depleted and not endless";
+            lastExecutionMessage = "Resource is depleted and not endless or you haven't unlocked it yet";
             return NodeResult.SUCCESS;
         }