Use new demo GeoServer location

demo.opengeo.org currently redirects to demo.boundlessgeo.com, so this
change makes it so the new location is used directly.

examples/getfeatureinfo-tile.js

@@ -5,7 +5,7 @@ goog.require('ol.source.TileWMS');
 
 
 var wmsSource = new ol.source.TileWMS({
-  url: 'http://demo.opengeo.org/geoserver/wms',
+  url: 'http://demo.boundlessgeo.com/geoserver/wms',
   params: {'LAYERS': 'ne:ne'},
   serverType: 'geoserver'
 });