[Fix] Adding newline at the end of files.

src/libUnuk/ButtonGroup.cpp

@@ -99,3 +99,4 @@ Button* ButtonGroup::GetButton(int index) {
   }
   return NULL;
 }
+

src/libUnuk/ButtonGroup.h

@@ -34,3 +34,4 @@ private:
 };
 
 #endif
+

src/libUnuk/WorldManager.cpp

@@ -52,3 +52,4 @@ NPC* WorldManager::GetNPC(int index) {
   }
   return NULL;
 }
+

src/libUnuk/WorldManager.h

@@ -18,3 +18,4 @@ public:
 private:
   std::list<NPC*> _npcs;
 };
+