Save custom mode (#1007)

* first step to save custom game

* localize various settings in custom game

* rename fields to lower cases

* fix many bugs

* fixes #1014

parts/modes/custom_puzzle.lua

@@ -60,4 +60,18 @@ return {
             PLY.newAIPlayer(2,BOT.template{type='CC',speedLV=2*AIlevel-1,next=math.floor(AIlevel*.5+1),hold=GAME.modeEnv.holdCount,node=20000+5000*AIlevel})
         end
     end,
+    savePrivate=function()
+        return {
+            FIELD=FIELD,
+            BAG=BAG,
+            MISSION=MISSION,
+            CUSTOMENV=CUSTOMENV,
+        }
+    end,
+    loadPrivate=function(private)
+        FIELD=private.FIELD
+        BAG=private.BAG
+        MISSION=private.MISSION
+        CUSTOMENV=private.CUSTOMENV
+    end,
 }