Add tooltips to image gallery demo

editions/tw5.com/tiddlers/demonstrations/ImageGallery Example.tid

@@ -1,5 +1,5 @@
 created: 20140809113603449
-modified: 20140919161451179
+modified: 20150520161451179
 tags: Learning
 title: ImageGallery Example
 type: text/vnd.tiddlywiki
@@ -15,6 +15,8 @@ margin: 1em;
 </style>
 <div class="my-gallery">
 <$list filter="[all[tiddlers+shadows]tag[$:/tags/Image]]">
+<span title=<<currentTiddler>>>
 <$transclude/>
+</span>
 </$list>
 </div>