Handle multiple records

[MatthewBooth]

We should have the ability to handle multiple records. I have thought of a number of ways we can work this into the project.

I personally have several domains I would like to update with my local dynamic IP (but currently aren't), so including this feature will solve that kind of problem.

I am unsure of how to achieve this without breaking things for existing users. If anyone reading this knows the best way of doing this, please get in touch.