Base Update() method was removed from components in engine, added some basic ECS systems to update the components. (#79)

Content.Server/GameObjects/EntitySystems/DoorSystem.cs

@@ -0,0 +1,22 @@
+using SS14.Shared.GameObjects;
+using SS14.Shared.GameObjects.System;
+
+namespace Content.Server.GameObjects.EntitySystems
+{
+    class DoorSystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            EntityQuery = new TypeEntityQuery(typeof(ServerDoorComponent));
+        }
+
+        public override void Update(float frameTime)
+        {
+            foreach (var entity in RelevantEntities)
+            {
+                var comp = entity.GetComponent<ServerDoorComponent>();
+                comp.OnUpdate(frameTime);
+            }
+        }
+    }
+}