POST Request Notifier

This would be a very useful feature for what I may be doing in the future.
Basically it sends a POST request to a specified host with the backup message and status.

`{"message"=>"[Backup::Success] MySQL Backup on localhost (localhost_mysql_backup)", "status"=>"success", "backup_version"=>"3.0.27", "token"=>"2131231232312321312"}`