Improvement to how imposters are handled

[Wild1145]

So I've been taking a nosey at the Forge Mod that @marcocorriero made, and I think it solves a fairly valid problem. Its not always practical to try and dig out information on a player when they join as an imposter, having some information like any other IP's / Usernames have been joined with the same details can be exceptionally helpful.

I also think re-formatting how messages are handled and more importantly making it clearer when an imposter joins that they are an imposter (as its not always that obvious) would be excellent. I think everything @marcocorriero's Mod is doing is excellent, but I feel it would make more sense to be handled within TFM on server side, instead of the clients side.