Add more social networks for login/register

That would be pretty cool. I know that @SoftCreatR has created a couple of 3rd party logins already. Maybe he is willing to share those as a plugin.
Nevertheless, I would also prefer to have those within the core.

I made all of the ones above and they're going to be released.

There's some stuff that needs to be done, before. So there's no ETA, yet.