Saving Addresses, Loading Addresses

I've implemented a really simple friends list.

You can save your coin address to a file, and then you can send that file to another computer. And then that computer can load the file and therefore load your address. And by loading your address, they can send you money without needing to copy-pase from a terminal.

That was the inspiration for doing this. Regardless, we now have some moderately non-stupid way to save and load addresses, and a hyper simple friend list implementation.