Merge pull request #998 from bartvde/tilemgrdefault

enable TileManager by default as suggested by @marcjansen and @bartvde ... (r=@ahocevar)

tests/Layer/MapServer.html

@@ -36,7 +36,7 @@
     
         var url = "http://labs.metacarta.com/cgi-bin/mapserv";
         layer = new OpenLayers.Layer.MapServer(name, url, params);
-        var map = new OpenLayers.Map('map');
+        var map = new OpenLayers.Map('map', {tileManager: null});
         map.addLayer(layer);
         var pixel = new OpenLayers.Pixel(5,6);
         var tile = layer.addTile(new OpenLayers.Bounds(1,2,3,4), pixel);