Server side voting implementation

Implemented voting on the server side. Rating is stored in the same table as quotes; added scalike query to update this rating. The controller will return the new rating value to client. It is planned to update ratings via AJAX requests so client won't rerender the whole page.

Things like IP and session filters may be implemented later. As @mikelsv said, "Будете накручивать, поставлю фильтрацию повторных голосов!"