Make sure games are ranked if an ACU was killed by the enemy team

[Sheeo]

The early unrankedness feature is there to prevent early disconnects from affecting games and allowing players to opt out of rankedness in such cases.

This shouldn't apply to early rush strategies, so we must make sure to rank these games in all circumstances.

[Brutus5000]

I would hook into the GameStatsService and inform the game about whethere ACUs haven been killed or not. Question: If a player leaves the game, his ACU is destroyed. Will this show up in the GameService as killed ACU?

[Brutus5000]

My new proposal is here: #143

[aeoncleanse]

Game side merged as FAForever/fa@4434984

[Brutus5000]

Server side was merged as well. (Connects to #143).
This issue can be closed.