Added structure handling in engine as well.

include/Structures/Spawn.hpp

@@ -3,17 +3,21 @@
 
 #include <Screeps/StructureSpawn.hpp>
 
+#include "Structures/Structure.hpp"
+
 namespace DouwcoHivemind
 {
-    class Spawn
+    class Spawn : public Structure
     {
     private:
-        Screeps::StructureSpawn *structure;
+        Screeps::StructureSpawn spawn;
 
     public:
-        Spawn(Screeps::StructureSpawn *structure_pntr) { structure = structure_pntr; }
+        Spawn(Screeps::StructureSpawn spwn) : spawn(spwn),
+                                              Structure() {}
         ~Spawn() {}
-        void process();
+
+        void loop() override;
     };
 }