we need a backup option

[danixland]

The script should offer a way to backup (and possibly restore) all the data in an automated way, create a dump of the database, save all files in the VirtualHost DocRoot and also the entry in the VHost config file.

The backup should then be saved as a compressed archive in a system directory and/or offered to the user to be stored somewhere safe.

The script should also allow the user to pass a compressed archive as a parameter to restore a backup.

[danixland]

will start working on this one once #3 is closed

[danixland]

the backup function should work in a similar way to the update function, allowing to backup all sites at once. Maybe with a "all" keywork passed as argument to the function.

[danixland]

basic backup and restore "per site" functionality are now merged in master, Need to work on the mass backup option.