PHP Randomly Generate String: Generate random string based on given parameters

This class can generate random string based on given parameters.

It can take several parameters and returns a string encoded using UTF-8 with random characters that match the required of the specified parameters. Currently it can take parameters that define:

- Minimum and maximum numbers of characters to use in the string
- List of characters to use in the string, as well the minimum quantity of characters to return from the list

In Spanish:

Esta clase te permitira generar una cadena aleatoria, dando algunos parametros como:

- min y max numero de caracteres a usar en la cadena
- lista de caracteres a usar en la cadena, especificando el numero minimo de caracteres por lista
- el resultado final es codificado en el formato utf-8, asi la cadena se mostrara correctamente.