Added some core loop mechanic

core.lua

@@ -145,3 +145,15 @@ function Core:disconnect()
 
     self.ws.close();
 end
+
+function Core:setLoop(loop)
+    self.loop = loop;
+end
+
+function Core:start()
+    while true do
+        if self.loop then
+            self.loop();
+        end
+    end
+end