Send origin gateway data when joining remote servers

[chrisfls]

• Creates Pass bounce_id when joining remote servers #291.
• Fixes Recover server information on Account bootstrap #289.
• Greatly improves Remote server joining (joining a gateway also joins its endpoints).

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This change is 

[PedroHLC]

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Reviewed 3 of 3 files at r1.
Review status: all files reviewed at latest revision, 2 unresolved discussions.

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src/Game/Update.elm, line 224 at r1 (raw file):

                |> List.map (joinRemote playerServer)
    in
        Dispatch.batch (myDispatch :: otherDispatches)

nice approach!

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src/Game/Update.elm, line 269 at r1 (raw file):

                    payload =
                        -- TODO: include bounce_id after settling

#291

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