APC & SMES appearances. (#78)

* CEV-Eris SMES sprite as RSI.

Has been modified so that the light overlay states use alpha blending.

* Add tiny glow to SMES display sprite.

* Appearances work v2

* More WiP

* RoundToLevels works correctly on even level counts now.

* SMES -> Smes because MS guidelines.

* CEV-Eris APC sprite.

* APC visuals.

* Reduce SMES scale again to normal levels.

* Update submodule

Content.Server/GameObjects/Components/Power/Powernet.cs

@@ -145,6 +145,10 @@ namespace Content.Server.GameObjects.Components.Power
                     break;
                 }
                 var demand = consumer.RequestCharge(frameTime);
+                if (demand == 0)
+                {
+                    continue;
+                }
                 var taken = Math.Min(demand, totalRemaining);
                 totalRemaining -= taken;
                 consumer.AddCharge(taken);
@@ -155,6 +159,10 @@ namespace Content.Server.GameObjects.Components.Power
             foreach (var supplier in PowerStorageSupplierList)
             {
                 var load = supplier.AvailableCharge(frameTime);
+                if (load == 0)
+                {
+                    continue;
+                }
                 var added = Math.Min(load, supplierUsed);
                 supplierUsed -= added;
                 supplier.DeductCharge(added);