add smaller Base Texture for better performance

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

@@ -1,17 +1,17 @@
 {
   "images" : [
     {
-      "filename" : "Base.png",
+      "filename" : "BaseTexture.png",
       "idiom" : "universal",
       "scale" : "1x"
     },
     {
-      "filename" : "Base-1.png",
+      "filename" : "BaseTexture-1.png",
       "idiom" : "universal",
       "scale" : "2x"
     },
     {
-      "filename" : "Base-2.png",
+      "filename" : "BaseTexture-2.png",
       "idiom" : "universal",
       "scale" : "3x"
     }