Use posttestserver.com for demo

FIX #12

Author: PowerKiKi

README.md

@@ -13,7 +13,7 @@ You can use with html5, jquery or every library or framework:
 >  to have a user control, clean, simple, customizable,
 > and above all very easy to implement.
 
-Try the [demo](http://realtica.org/ng-uploader/demo.html).
+Try the [demo](https://htmlpreview.github.io/?https://github.com/angular-ui/ui-uploader/master/demo/index.html).
 
 
 Compatibility

demo/index.html

@@ -27,7 +27,7 @@
                 $scope.btn_upload = function() {
                     $log.info('uploading...');
                     uiUploader.startUpload({
-                        url: 'http://realtica.org/ng-uploader/demo.html',
+                        url: 'https://posttestserver.com/post.php',
                         concurrency: 2,
                         onProgress: function(file) {
                             $log.info(file.name + '=' + file.humanSize);
@@ -56,7 +56,7 @@ <h1>Uploader</h1>
             <div class="row">
                 <div class="col-md-6">
                     <h3>What?</h3>
-                    <p>Upload multiple files at the same time. See <a href="http://realtica.org/ng-uploader/demo.html">demo with upload actually working</a>.</p>
+                    <p>Upload multiple files at the same time.</p>
 
                     <div class="well">
                         <div>