public FileContentResult DownloadDemoClip(string clipId)
{
IMyMentorRepository repository = new ParseRepository(new WebCacheProvider(HttpContext.ApplicationInstance.Context));
var clipUrl = repository.FindDemoClipURI(clipId);
var streamer = new FileStreamer(HttpContext);
var stream = streamer.GetTempFileUrl(clipUrl);
return File(stream, "audio/mpeg3");
}