add info about rebuilding linodes

What's up @rick

I've been spending time learning Puppet. I'm aware most people probably use a VM for that, but I've been using Linode and rebuilding when necessary.

There's awesome rebuild functionality via the web interface:

![](http://i.imgur.com/9MHsw.png)

But there is no rebuild via API... However I wrote a script to rebuild your Linode using the wrapper you wrote.

It's been discussed about on the Linode forums: http://forum.linode.com/viewtopic.php?t=8329 so I'm sure there are other people who may find this useful.

I've added a small line to the bottom of your README that links to [razic/linode-rebuild](https://github.com/razic/linode-rebuild).

Obviously feel free to reject if you don't think it's worth it.