loading binaries via xhr in ie8 no longer breaks
added a 'timeout' property on html5Preloaders

	var preloader = new html5Preloader();
	preloader.timeout = 5000;
	// this will put a 5 second timeout on all file loads calls
	// which will trigger an error, if the load call hasn't completed
ensuring the same file doesn't contribute to incrementing the loaded counter more than once
Merge pull request #26 from janeklb/master

Loading binaries via xhr in ie8, adding 'timeout' support