Added spy panels to map and histogram, added editor toggle to enable/disable spy

panels/pie/editor.html

@@ -99,4 +99,15 @@
     <label class="small">Mode</label> 
     <select class="input-small" ng-change="set_mode(panel.mode)" ng-model="panel.mode" ng-options="f for f in ['query','terms','goal']"></select>
   </div>
+</div>
+<h5>Panel Spy</h5>
+<div class="row-fluid">
+  <div class="span2"> 
+    <label class="small"> Spyable </label><input type="checkbox" ng-model="panel.spyable" ng-checked="panel.spyable">
+  </div>
+  <div class="span9 small">
+    The panel spy shows 'behind the scenes' information about a panel. It can
+    be accessed by clicking the <i class='icon-eye-open'></i> in the top right
+    of the panel.
+  </div>
 </div>