增加Attachments公开属性

SpineRuntimes/SpineRuntime21/Skin.cs

@@ -39,6 +39,7 @@ namespace SpineRuntime21 {
 			new Dictionary<KeyValuePair<int, String>, Attachment>(AttachmentComparer.Instance);
 
 		public String Name { get { return name; } }
+        public Dictionary<KeyValuePair<int, String>, Attachment> Attachments { get { return attachments; } }
 
         public Skin (String name) {
 			if (name == null) throw new ArgumentNullException("name cannot be null.");