LiveDNS RESTful API support

[Danamir]

Sadly, gandyn does not support the latest Gandi inteface and RESTful API : LiveDNS.

Instead of forking your code an breaking almost everything, I created a new project dyn-gandi doing almost the same thing, via the new API.

Give it a try if you wish, delete this "issue" if needed. I really wanted to send you a message first, but I cannot find it in the GitHub interface.

Thanks again for the many years of use ! (You are credited in my doc ^^)

Cheers !