Implement winning

[tehKaiN]

fixes #689

Stuff that works:

• Game checks if any player has lost by losing destroying all military buildings
• Game checks if any player has won by checking if all other players from other teams are defeated
• If player has won/lost his/her fog of war gets revealed and appropriate message displayed on top (vanilla S3 style)

Things I'm unsure implementation-wise

• I've made BuildingCounts public so that I can call it in WinLoseTracker and I'm unsure if this is acceptable
• I'm unsure if it's fine that WinLoseTracker generates new BuildingCounts each time it runs - I wanted to recount building, but perhaps there's a better way
• Everything else too. I'm new to the codebase and haven't dug to the bottom of it so I did some assumptions on how things work. I wouldn't be surprised if I did something in unclean way. ;)

Things I'm unsure of codestyle-wise:

• I don't know if you accept ternary operator (?: condition) I found it in InventoryPanel so I think it's not a problem
• I don't know if you accept early returns (check for inverse condition and breaking/continuing/returning on them to prevent too many indents)

[tehKaiN]

Quoting @paulwedeck's message on discord:

Why arent you calling disableFogOfWar directly in WinLoseTracker#timerEvent ? As far as I know Actions are there to notify any potential listeners of an UI interaction So atleast the Action stuff should be removed Maybe add something like getVisibleStatusPlayer in MainGrid.GraphicsGrid that returns the IPlayer from FogOfWars constructor If this is the just determined victor you call mainGrid.disableFogOfWar()

So I rewrote my code so that it disables FoW from WinLoseTracker's timerEvent()

[andreas-eberle]

@tehKaiN: Ternary and early returns are both allowed. In general, we aim to write readable code ;)

[andreas-eberle]

@tehKaiN: Thanks for your PR! Keep up the good quality!

I just found three small issues:

• FoW wasn't disabled when a player lost
• the players should not be allowed to do anything any more, if they lost the game.
• the win state was not persisted in the savegame. Therefore, after loading a savegame it was null.

I fixed these issues and will merge it when CI is green.

[tehKaiN]

Thanks for bug finding! I'll try to test my next changes more thoroughly.