unjoin implemented, and travel display re-organized

www/templates/travels.html

@@ -16,6 +16,13 @@
                 <input type="search" placeholder="search..." ng-model="search">
             </label>
         </div>
+
+        <div class="card" ng-show="!travels">
+          <div class="item item-text-wrap">
+            No data in memory.<br>
+            Pull from top to refresh
+          </div>
+        </div>
         <a ng-repeat="travel in travels | orderBy: 'date' | filter: search" class="item item-avatar" href="#/app/travels/{{travel._id}}">
           <img ng-src="img/{{travel.modality}}.png"/>
           <h2>{{travel.title}}</h2>