[WIP] Infection gametype (originally by FruitieX, attemptedly revived by Debugger, and again by TimePath)
Submitting for review to find more issues before considering it ready. May add more to it in the future.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Submitting for review to find more issues before considering it ready. May add more to it in the future.