Removing cache from Gleed2D as ContentManager automatically does this

Adding cache
Adding XOR Shift random class

axios/Engine/Data/Cache.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Axios.Engine.Data
+{
+    // Q. What is the point of this?
+    // A. This is not to cache textures loaded by content manager
+    //    but other data/content that isn't. Use cases include:
+    //    - Any graphics generated during runtime (such as dialogs)
+    //    - Any data that is loaded in during run time (such as maps)
+    //    Content manager performs it's own caching so anything loaded by it
+    //    or the Gameservice - then attempted to load again will not be loaded
+    //    again but rather a reference to it will be returned
+    //    ************************************************
+    //    DANGER WILL ROBINSON DANGER
+    //    ************************************************
+    //    Only store stuff here that you want during the FULL lifecycle of your game
+    //    The cache is never cleared - so a reference will exist for the objects you leave
+    //    You MAY clear the cache by using the clear method or unset
+    //
+    //    You probably don't want this
+    //    There is no cache...
+    //    This is not the cache you are looking for...
+    //
+    public class Cache : Singleton<Cache>
+    {
+        private Dictionary<string, object> _cache;
+        public Cache()
+        {
+            _cache = new Dictionary<string, object>();
+        }
+
+        public object get(string key)
+        {
+            return _cache[key];
+        }
+
+        public void set(string key, object obj)
+        {
+            _cache[key] = obj;
+        }
+
+        public void unset(string key)
+        {
+            _cache.Remove(key);
+        }
+
+        public void clear()
+        {
+            _cache = new Dictionary<string, object>();
+        }
+    }
+}