Merge branch '11-view-background' into 'development'

Background add

Closes #11

See merge request marcel.schwarz/software-projekt-2!18

GoldWars/GoldWars/Assets.xcassets/Background.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "Backgorund.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "Background@2x.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "Background@3x.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

GoldWars/GoldWars/Game/GameScene.swift

@@ -54,6 +54,14 @@ class GameScene: SKScene, SKPhysicsContactDelegate {
         addPhysicsBodyToBase()
 
     }
+    override func didMove(to view: SKView) {
+         let background = SKSpriteNode(imageNamed: "Background")
+         background.position = CGPoint(x: self.size.width / 2, y: self.size.height / 2)
+         background.zPosition = -1
+         background.size = self.size
+         self.addChild(background)
+     }
+     
     
     func addPhysicsBodyToBase() {
         bases[5].physicsBody = SKPhysicsBody(circleOfRadius: 20)