Add support for users.address API call

[clarkewd]

It would be nice to see support for Namecheap's users.address methods:

create — Creates a new address for the user
delete — Deletes the particular address for the user.
getInfo — Gets information for the requested addressID.
getList — Gets a list of addressIDs and addressnames associated with the user account.
setDefault — Sets default address for the user.
update — Updates the particular address of the user

I looked in the code but did not see anywhere these calls would be supported. Thank you for writing this helpful wrapper!

[parasquid]

Hey! Sounds good. Might take some time since I'm in the middle of refactoring the code, but I'll add it in the todo list :)

If you've tried writing your own methods to support the api, I'd love to look at a PR :)

[clarkewd]

thanks! if I go that route I will be modeling your code ;)