Nodes - Changed storage to be based on generics

Nodes - Added XML docs to most types

src/Artemis.Storage/Entities/Profile/Nodes/NodePinCollectionEntity.cs

@@ -2,8 +2,7 @@
 {
     public class NodePinCollectionEntity
     {
-        public string Name { get; set; }
-        public string Type { get; set; }
+        public int Id { get; set; }
         public int Direction { set; get; }
         public int Amount { get; set; }
     }