CLI not operational after deleting account on another device

When deleting an account with multiple devices attached, the CLI on other devices is no longer functional and returns `ERROR User deleted`, this is somewhat expected.

Running `keybase login` returns the same message though, as does `keybase account delete` and `keybase logout`.

The latter two should delete any profile provisioning on the client to allow for new accounts to be added.

Admittedly this is more of an edge case, but I imagine there are enough people out there who have changed their handle and would like keybase to match.

Start with the CLI entry points for `keybase login`, `keybase account delete`, and `keybase logout`, and reproduce the `ERROR User deleted` behavior after deleting an account on another device. Done means the latter two commands can remove the client’s profile provisioning and allow a new account to be added.

Written by the indexing model from the issue text.