make chrome fallback to flashplayer because we don't control our cdn and

chrome changed its behaviour with redirects and multiple origins.
As a result playback is broken, probably since version 47:

* https://code.google.com/p/chromium/issues/detail?id=532569
* whatwg/fetch#145

app/views/frontend/shared/_videoplayer_js.haml

@@ -2,6 +2,7 @@
   var stamp = window.location.hash.split('&t=')[1];
   $('video').mediaelementplayer({
     usePluginFullScreen: true,
+    mode: $.browser.chrome ? 'shim' : 'auto',
 
     //pluginPath: '/assets/',
     enableAutosize: true,