Resizer: Handle and process uploaded images

This class can be used to handle and process uploaded images.

It can check if an uploaded has one of the accepted file name extensions and copy it to a destination directory.

The class can also resize an uploaded image file.

In Spanish:

Es una clase para subir imagenes al servidor, y modificar su tamaño de acuerdo al tamaño que uno quiera. Esta realizada lo mas genericamente posible.