Actual lockers (#195)

Adds storing entities into lockers the way we all know and love.
Relies on an implementation of ITileDefinition in https://github.com/space-wizards/space-station-14/pull/193 (just like origin/master)
#191

Content.Server/EntryPoint.cs

@@ -76,6 +76,7 @@ namespace Content.Server
             factory.Register<ClothingComponent>();
             factory.RegisterReference<ClothingComponent, ItemComponent>();
             factory.RegisterReference<ClothingComponent, StoreableComponent>();
+            factory.Register<PlaceableSurfaceComponent>();
 
             factory.Register<DamageableComponent>();
             factory.Register<DestructibleComponent>();
@@ -117,6 +118,7 @@ namespace Content.Server
 
             factory.Register<ServerStorageComponent>();
             factory.RegisterReference<ServerStorageComponent, IActivate>();
+            factory.Register<EntityStorageComponent>();
 
             factory.Register<PowerDebugTool>();
             factory.Register<PoweredLightComponent>();