fix the PHP Notice:  Undefined property: stdClass:: in /vagrant/php_backup_s3/include/S3.php on line 1972
set the gitignore to ignore the backup.php file.
remove the leading hifen on the backup.tar.bz2 name when is not a hourly backup.
Merge pull request #5 from emersonbroga/master

Fix the PHP Notice:  Undefined property $body and add a gitignore file to ignore the backup.php