First Pull Request

Since ```Thread::countRowThread();``` has been called in the [controller's function](https://github.com/josephisleta/BoardExercises/blob/dev_1.0/board/app/controllers/thread_controller.php#L10) that calls this function, you may use the variable there and pass it as an argument in this function, in that way, there will be less access on your database po :bow:

> Additional: when you call a function on the same class, you may use self po:
```self::countRowThread()``` :bow: