Make keybase lookup works for key ids starting with 0x
List full keybase id or strong key id matches on top
Add extraData property in ImportKeyListEntry

This allows any KeyServer to store some extra data it might need.
In the case of KeybaseKeyServer it is the username, which then can
be grabbed directly, without the hack of storing it as userId.
Don't guess keybase key algorithm and size

Once keybase reports them, we can display them. Until then we simply
don't know and shouldn't lie about it.
Cleanup keybase query a bit

Remove ctime and the cached key, making the query for the entire user
object unnecessary. This should only be done when the user decides to
import the key. Hopefully keybase.io can provide all info necessary in
the search results.
Add github, twitter, website info for keybase keys

The very point of keybase.io is the identification and proven link
to those identities, so it should be nice to have them.
The display is a bit basic still, as it just adds them as userIds,
I'm sure this can be prettified, perhaps with logos?