Show chat messages while chat message window is closed, Fixes #58
Give flags GUID's so DMP sends them to the server.
Implement 'Screenshot downloading...' message.
Fix OnVesselDestroy/Recover/Terminate refactor.
Don't send position updates for flags.
Explicitly disable the worker when it is reset. Register sent asteroids as server vessels so they can be removed.
Unregister GameEvent hooks when the worker is reset, Fix docking and player-player docking