Overhaul item and inventory and clean up bits and pieces

Zennysoft.Game.Ma.Implementation/Item/IAugmentableItem.cs

@@ -0,0 +1,7 @@
+namespace Zennysoft.Ma.Adapter
+{
+  public interface IAugmentableItem
+  {
+    public Augment? Augment { get; }
+  }
+}