chore: readme and sample update

Author: AidasK

README.md

@@ -72,7 +72,8 @@ file is instance of [FlowFile](https://github.com/flowjs/flow.js#flowfile).
 ### Quick setup
 ````html
 <div flow-init="{target: '/upload'}"
-     flow-files-submitted="$flow.upload()">
+     flow-files-submitted="$flow.upload()"
+     flow-file-success="$file.msg = $message">
 
   <input type="file" flow-btn/>
   Input OR Other element as upload button
@@ -82,12 +83,12 @@ file is instance of [FlowFile](https://github.com/flowjs/flow.js#flowfile).
     <tr ng-repeat="file in $flow.files">
         <td>{{$index+1}}</td>
         <td>{{file.name}}</td>
+        <td>{{file.msg}}</td>
     </tr>
   </table>
 </div>
 ```
 
-
 Need more examples?
 ============
 Clone this repository and go to "ng-flow/samples/basic/index.html".

samples/image/index.html

@@ -29,8 +29,8 @@ <h1>flow image example</h1>
       <img flow-img="$flow.files[0]" />
     </div>
     <div>
-      <a href="#" class="btn" ng-hide="$flow.files.length" flow-btn>Select image</a>
-      <a href="#" class="btn" ng-show="$flow.files.length" flow-btn>Change</a>
+      <a href="#" class="btn" ng-hide="$flow.files.length" flow-btn flow-attrs="{accept:'image/*'}">Select image</a>
+      <a href="#" class="btn" ng-show="$flow.files.length" flow-btn flow-attrs="{accept:'image/*'}">Change</a>
       <a href="#" class="btn btn-danger" ng-show="$flow.files.length"
          ng-click="$flow.cancel()">
         Remove