MySQL utility

This is a class meant to execute tasks for multiple purposes of accessing a MySQL database.

It can:
* Take a backup and restore a database using MySQL dump files
* Execute the most common types SQL queries passing lists of parameters
* Perform controlled rollback to undo the last executed SQL query whenever possible
* Copy a database from a local server to a remote MySQL server
* Lock and unlock tables.
* Optimize and analize tables.
* Display the data from a table in a Tabloid type listing that can be sorted by ascending or descending order.
* Generate an HTML user interface to list, add, edit and delete table rows.

The comments in the code are in Spanish.