Sec roundstart popup

[jaydunc]

I was thinking that maybe if there was an informational popup what appears when you spawn in as a sec officer then people would be less clueless and lost if they're new to the game or new to sec in general. It might also make abuse occur less often depending on what information is put in the popup. Just a suggestion, I thought of it when I rolled traitor and realised that the popup that antags get may be useful when spawning in as sec.