Support to configure user settings with dothub

[mariocj89]

The same way we pull/push an org configuration we should be able to do it for users.

Commands will be:

dothub pull <username>
dothub push <username

We can "shoe it" into an org but it is far from clean an ideal. A new object should be created in the same way orgs and repos are.

Warning: This is not a simple not quick issue, please reach out before starting if you pick this up.