#1 automatically delete old backups

[Frank Wall]

It would be nice if AutoBackupMySQL could be configured to automatically delete old backups.

For example, I would simply tell AutoBackupMySQL how long to keep the backups. After each
backup run it would automatically search for older backups (using `find`) and delete them. Deleted
files should be part of the log / mail report, too.

I would volunteer to implement this feature if it's appropiate...

[Vijay Kiran Kamuju]

it removes the daily backups at the end of the week and weekly backups after a month.