Fix deprecated exitSceneUrl properties

This replaces all occurrences of exitSceneUrl (which is deprecated) by
exitUrl.

dezentrale_e1.json

@@ -59,7 +59,7 @@
          "opacity":1,
          "properties":[
                 {
-                 "name":"exitSceneUrl",
+                 "name":"exitUrl",
                  "type":"string",
                  "value":".\/main.json#entry_dezentrale_e0"
                 }],
@@ -77,7 +77,7 @@
          "opacity":1,
          "properties":[
                 {
-                 "name":"exitSceneUrl",
+                 "name":"exitUrl",
                  "type":"string",
                  "value":".\/main.json#entry_party"
                 }],
@@ -204,7 +204,7 @@
  "nextobjectid":1,
  "orientation":"orthogonal",
  "renderorder":"right-down",
- "tiledversion":"1.4.2",
+ "tiledversion":"1.4.3",
  "tileheight":32,
  "tilesets":[
         {
@@ -3259,4 +3259,4 @@
  "type":"map",
  "version":1.4,
  "width":100
-}
+}

main.json

@@ -53,7 +53,7 @@
          "opacity":1,
          "properties":[
                 {
-                 "name":"exitSceneUrl",
+                 "name":"exitUrl",
                  "type":"string",
                  "value":".\/dezentrale_e1.json#entry_dezentrale_e1"
                 }],