Create backup script to MySQL database

[andrepg]

We have, at this moment, some VPS running and need to write a single MySQL script to deal with backup and compress of databases, based on a file, array or whatever it's easier.

We need that the script do

1. Read of database names (from file or array as argument)
2. Perform a database and compress each generated file
3. Group all backups inside a single folder to make more easy the copy to outside.