Add support for KxoId

[krixano]

You'll also need to change the data/users/content.json file.

Btw, KxoId uses a two-level system where id's can be signed with two different keys. The first key (12F5SvxoPR128aiudte78h8pY7mobroG6V) is what my own servers sign with and this is always preferred first for all KxoId registrations - this is level1. The second key is used by "Trusted Peers" to sign ids, and is only done if my own servers happen to be down for some reason. You can read more about how this works here: http://127.0.0.1:43110/1GTVetvjTEriCMzKzWSP9FahYoMPy6BG1P/?/kxoid

I've added both keys to the data-default/users/content.json - but you can change this to just the first key if you only want to support level-1 (keys signed only with my own servers).

"kxoid.bit": [ "12F5SvxoPR128aiudte78h8pY7mobroG6V", "18Mt3CWBpiqJBLsPSu5JxB4B9MeaSwhyJ" ]

I also didn't make any changes to show the cert-provider on the zite like you did with ZeroTalk.