tests: created a new tileset for individual image tiles with animations and properties

tests/test_data/tilesets/individual_images/tileset.json

@@ -0,0 +1,129 @@
+{ "columns":0,
+ "editorsettings":
+    {
+     "export":
+        {
+         "format":"",
+         "target":"."
+        }
+    },
+ "grid":
+    {
+     "height":1,
+     "orientation":"orthogonal",
+     "width":1
+    },
+ "margin":0,
+ "name":"tileset",
+ "spacing":0,
+ "tilecount":4,
+ "tiledversion":"1.3.5",
+ "tileheight":32,
+ "tiles":[
+        {
+         "animation":[
+                {
+                 "duration":100,
+                 "tileid":0
+                }, 
+                {
+                 "duration":100,
+                 "tileid":1
+                }, 
+                {
+                 "duration":100,
+                 "tileid":2
+                }, 
+                {
+                 "duration":100,
+                 "tileid":3
+                }],
+         "id":0,
+         "image":"..\/..\/images\/tile_01.png",
+         "imageheight":32,
+         "imagewidth":32,
+         "properties":[
+                {
+                 "name":"float property",
+                 "type":"float",
+                 "value":2.2
+                }],
+         "type":"tile"
+        }, 
+        {
+         "id":1,
+         "image":"..\/..\/images\/tile_02.png",
+         "imageheight":32,
+         "imagewidth":32,
+         "objectgroup":
+            {
+             "draworder":"index",
+             "name":"",
+             "objects":[
+                    {
+                     "height":13.7196924896511,
+                     "id":2,
+                     "name":"",
+                     "rotation":0,
+                     "type":"",
+                     "visible":true,
+                     "width":14.4766410408043,
+                     "x":13.4358367829687,
+                     "y":13.5304553518628
+                    }, 
+                    {
+                     "ellipse":true,
+                     "height":11.070372560615,
+                     "id":3,
+                     "name":"",
+                     "rotation":0,
+                     "type":"",
+                     "visible":true,
+                     "width":14.287403903016,
+                     "x":13.8143110585452,
+                     "y":1.98698994677705
+                    }],
+             "opacity":1,
+             "type":"objectgroup",
+             "visible":true,
+             "x":0,
+             "y":0
+            },
+         "properties":[
+                {
+                 "name":"string property",
+                 "type":"string",
+                 "value":"testing"
+                }],
+         "type":"tile"
+        }, 
+        {
+         "id":2,
+         "image":"..\/..\/images\/tile_03.png",
+         "imageheight":32,
+         "imagewidth":32,
+         "properties":[
+                {
+                 "name":"bool property",
+                 "type":"bool",
+                 "value":true
+                }],
+         "type":"tile"
+        }, 
+        {
+         "id":3,
+         "image":"..\/..\/images\/tile_04.png",
+         "imageheight":32,
+         "imagewidth":32,
+         "properties":[
+                {
+                 "name":"color property",
+                 "type":"color",
+                 "value":"#ff5500ff"
+                }],
+         "type":"tile"
+        }],
+ "tilewidth":32,
+ "type":"tileset",
+ "version":1.2
+}