Inventories (#61)

* Bully the fuck out of inventory shit
Inventory Stuff
Inventories technically work
It works technicaly speaking
Yeah this part too
Lets do it!
Inventories completed
Motherfucker

* Remove unnecessary usings and fix one thing

* Submodule update

* Adds a bunch of various clothing prototypes for each current inventory slot

Content.Client/GameObjects/Components/Items/ClientHandsComponent.cs

@@ -60,7 +60,10 @@ namespace Content.Client.GameObjects
 
         public void UseActiveHand()
         {
-            SendNetworkMessage(new ActivateInhandMsg());
+            if(GetEntity(ActiveIndex) != null)
+            {
+                SendNetworkMessage(new ActivateInhandMsg());
+            }
         }
     }
 }