Added textures to biomes and an expression parser.

Game/Assets/Scripts/Model/Biome.cs

@@ -40,5 +40,11 @@ namespace TransportGame.Model
         /// </summary>
         [XmlElement("vegetationDensity")]
         public Range VegetationDensity { get; set; }
+
+        /// <summary>
+        /// Gets or sets an array of textures to use
+        /// </summary>
+        [XmlArray("textures")]
+        public Texture[] Textures { get; set; }
     }
 }

Game/Assets/Scripts/Model/Texture.cs

@@ -2,10 +2,17 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using System.Xml.Serialization;
 
-namespace Assets.Scripts.Model
+namespace TransportGame.Model
 {
-    class Texture
+    [XmlRoot("texture")]
+    public class Texture
     {
+        [XmlAttribute("src")]
+        public string Source { get; set; }
+        
+        [XmlAttribute("expr")]
+        public string Expression { get; set; }
     }
 }