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/EntryPoint.cs

@@ -91,6 +91,8 @@ namespace Content.Server
 
             factory.Register<PowerDebugTool>();
             factory.Register<PoweredLightComponent>();
+            factory.Register<SmesComponent>();
+            factory.Register<ApcComponent>();
         }
 
         /// <inheritdoc />