Add imagemap that uses a prerendered background

assets/imagemap.tmj

@@ -0,0 +1,99 @@
+{ "compressionlevel":-1,
+ "height":48,
+ "infinite":false,
+ "layers":[
+        {
+         "id":4,
+         "image":"../assets/ffbg2-scaled.png",
+         "name":"Image Layer 1",
+         "offsetx":5.6843418860808e-14,
+         "offsety":2.01612903225805,
+         "opacity":1,
+         "type":"imagelayer",
+         "visible":true,
+         "x":0,
+         "y":0
+        }, 
+        {
+         "draworder":"topdown",
+         "id":2,
+         "locked":true,
+         "name":"Object Layer 1",
+         "objects":[
+                {
+                 "gid":147,
+                 "height":16,
+                 "id":1,
+                 "name":"player",
+                 "properties":[
+                        {
+                         "name":"character",
+                         "type":"string",
+                         "value":"little guy"
+                        }, 
+                        {
+                         "name":"state",
+                         "type":"int",
+                         "value":24
+                        }],
+                 "rotation":0,
+                 "type":"actor",
+                 "visible":true,
+                 "width":16,
+                 "x":440.510088317656,
+                 "y":140.347239175702
+                }, 
+                {
+                 "gid":149,
+                 "height":16,
+                 "id":2,
+                 "name":"npc",
+                 "properties":[
+                        {
+                         "name":"character",
+                         "type":"string",
+                         "value":"little guy"
+                        }, 
+                        {
+                         "name":"state",
+                         "type":"int",
+                         "value":272
+                        }],
+                 "rotation":0,
+                 "type":"actor",
+                 "visible":true,
+                 "width":16,
+                 "x":261.106052990594,
+                 "y":156.523012852732
+                }],
+         "opacity":1,
+         "type":"objectgroup",
+         "visible":true,
+         "x":0,
+         "y":0
+        }],
+ "nextlayerid":5,
+ "nextobjectid":3,
+ "orientation":"orthogonal",
+ "renderorder":"right-down",
+ "tiledversion":"1.8.2",
+ "tileheight":16,
+ "tilesets":[
+        {
+         "columns":48,
+         "firstgid":1,
+         "image":"../assets/World_A1.png",
+         "imageheight":576,
+         "imagewidth":768,
+         "margin":0,
+         "name":"World_A1",
+         "spacing":0,
+         "tilecount":1728,
+         "tileheight":16,
+         "tilewidth":16
+        }],
+ "tilewidth":16,
+ "type":"map",
+ "version":"1.8",
+ "width":64
+}

assets/properties.json

@@ -0,0 +1,7 @@
+{
+    "properties": {
+	"some.key.with.a.value": "value",
+	"game.screenwidth": "640",
+	"game.screenheight": "480"
+    }
+}