Makes map vote and roundstart smart about player count. (#5418)

* Makes map vote and roundstart smart about player count.
No more Saltern with 30 players, or Knight Ship with 50.

* a typo

* Address reviews.

* Localized.

Resources/Prototypes/Maps/game.yml

@@ -0,0 +1,20 @@
+- type: gameMap
+  id: saltern
+  mapName: Saltern
+  mapPath: Maps/saltern.yml
+  minPlayers: 0
+  maxPlayers: 20
+  fallback: true
+
+- type: gameMap
+  id: packedstation
+  mapName: Packedstation
+  mapPath: Maps/packedstation.yml
+  minPlayers: 15
+
+- type: gameMap
+  id: knightship
+  mapName: Knight Ship
+  mapPath: Maps/knightship.yml
+  minPlayers: 0
+  maxPlayers: 8

Resources/Prototypes/Maps/test.yml

@@ -0,0 +1,7 @@
+- type: gameMap
+  id: empty
+  mapName: Empty
+  mapPath: Maps/Test/empty.yml
+  minPlayers: 0
+  maxPlayers: 0
+  votable: false